Car Runs After Jump Start Shut Off and Try Again Then It Fails

Dan Ferrell writes most practice-it-yourself automobile maintenance and repair. He has certifications in automation and control engineering science.

An engine stall status can be caused by many different systems or components.

Photograph License: CC0 Public Domain

When your machine engine starts only stops after, whether immediately or subsequently a few minutes, there could be one or more than specific systems or components backside the failure. For instance:

• the ignition or injection system
• a low idle speed in need of aligning
• a maladjusted carburetor
• vacuum leaks
• one or more than bad sensors

To make matters worse, stalling may happen nether one or more operating atmospheric condition. For example, the engine may:

• stall every bit soon every bit it starts
• stall during idle
• stall when warm
• stall intermittently under whatever condition

The conditions associated with your stalling problem volition give you clues as to what systems or components are causing your problem.

And then the all-time mode to start your diagnostic is to identify, when possible, the conditions under which the stalling occurs, and focus your attention on those systems or components associated with the failure under that particular condition.

How to Investigate and Diagnose Your Problem

The following sections discuss different operating conditions associated with stalling, and which systems and components are nigh probable to cause stalling nether those weather. The last section focuses on what to do when stalling happens intermittently and seemingly randomly.

Then, beginning by checking those components or systems in the section that best describes your detail engine problem, and and so, if necessary, move on to systems or components described in other sections, especially if you doubtable these systems need maintenance or accept given you problems in the past. This approach will brand it easier for you to diagnose the trouble much faster and will work in well-nigh cases.

Bank check for Codes

Also, be sure to cheque the computer system for whatsoever diagnostic problem codes (DTCs) that might be stored in memory, whether the "check engine" low-cal has come up on or not. One or more sensors may have triggered a pending code. If you lot don't take a scanner tool, you may be able to have your vehicle to a local auto parts store to become the codes retrieved, or the shop may lend yous the scanner. Better yet, buy a relatively cheap but quality automotive scanner from your local auto parts store or online.

A Tip: The Anti-Theft Organization

If you've seen the anti-theft light blinking recently, make certain the anti-theft system is working properly. The organisation itself tin can be the source of the trouble. Sometimes you need to reset the system (brand the system become through a re-learning procedure) to get the engine working right over again. If necessary, consult your vehicle repair manual.

Index
I. If Your Engine Stops Immediately Subsequently It Starts
Ii. If the Engine Stalls at Idle
III. If the Engine Stalls at Idle Unless You Printing the Accelerator
Four. If the Engine Starts When Cold just Stops When Warm
V. If the Engine Stalls Intermittently

Your engine may terminate as soon as you lot let the primal return from the Starting time to the Run position. Most of the fourth dimension, this status points to a badly clogged fuel filter or an ignition switch in demand of adjustment or with worn/burned contacts.

A quick test to come across if you have a trouble with the fuel system is past using carburetor cleaner or starting fluid:

1. Carefully disconnect the air cleaner outlet tube from the throttle torso.
2. Inquire an banana to kickoff the engine.
3. As soon equally the engine catches and the ignition key returns to the Run position, spray some carburetor cleaner into the throttle torso.
4. If the engine idles momentarily with the carburetor cleaner, in that location may be a problem with fuel delivery.

The trouble tin can be with the fuel filter, fuel pump, anchor resistor, or fuel force per unit area regulator.

Start with the fuel filter. When was the final fourth dimension you replaced the filter? Check the fuel filter service interval in your motorcar owner's manual or repair manual. If the fuel system uses an in-line filter:

• Remove the filter.
• Blow through the filter in the direction of fuel flow.
• If air goes through with difficulty, or not at all, there'due south your problem

Scroll to Go on

Read More from AxleAddict

When necessary, use a fuel pressure gauge to cheque system pressure. Follow the instructions in your vehicle repair manual. If yous don't have the manual, you lot tin buy an inexpensive, aftermarket copy at your local car parts store or online.

Other components that tin cause yous trouble are:

• fuel pump
• fuel injectors
• engine coolant temperature (ECT) sensor (run across the next section)
• fuel pressure regulator
• crankshaft position (CKP) sensor

Usually, a bad CKP volition trigger the check engine calorie-free (CEL). So scan the calculator for DTCs if you haven't done and then however.

To practise a quick check for potential CKP problems:

• While, cranking the engine, pay attention to the tachometer on your dashboard.
• If the RPMs remain at goose egg, this may point to a problem with the CKP sensor.

Check your vehicle repair manual to help yous exam the crankshaft sensor, if necessary. Even if the sensor itself is skillful, in that location could be an electrical open or brusque in the excursion.

Check the ignition switch:

If you lot seem to be getting good fuel supply, and the previous tests didn't yield any clues, endeavour checking the ignition switch. Ignition switch contacts wear out over time.

Sometimes, you can detect problems with the contacts by holding the central frontwards in the Start position when cranking the engine. The engine may catch in the Start position, just as soon as you permit the cardinal return to the Run position, the engine dies.

1. First proceeds access to the ignition switch. Consult your vehicle repair manual.
2. Brand sure the switch is properly connected to the electrical connector.
3. Clasp the switch and electrical connector together with your mitt as you endeavor to start the engine.
4. If the engine starts and remains idling while holding the switch and connector together, you demand to properly connect the switch.

Even if this quick test doesn't yield results, you volition nevertheless desire to troubleshoot the ignition switch. Your vehicle repair manual may help you lot hither.

Check for throttle trunk and throttle plate buildup:

Likewise, bank check your throttle trunk and throttle plate for coking. Carbon buildup volition prevent proper operation of the throttle valve. If the valve doesn't have free motion, it tin can cause a rough idle and stalling with light buildup. Coking usually causes the engine to die immediately afterwards the engine starts.

You lot tin apply carburetor cleaner to remove carbon buildup from the throttle bore and valve, if necessary.

Verify that the ignition system has a expert, stiff spark.

Photograph license: CC0 Creative Eatables

Two. If the Engine Stalls at Idle

Various components and maintenance bug may cause an engine to stall when idling. The source of the problem may differ with the type of engine model or configuration.

Ignition System Issues

The system may have a weak spark or the spark may neglect to reach the spark plugs.

• Start by checking the service schedule for the spark plugs and spark plug wires.
• Remove and check one spark plug at a time.
• Check the electrodes' gap using a wire judge and compare to specs in your vehicle repair manual.
• A plug that burns the air-fuel mixture correctly has a dark-brown to grayish-tan color. Other colors may indicate problems with the fuel, ignition or even mechanical problems.
• A wet plug may betoken too much fuel reaching the cylinder, or a mechanical problem that is leaking oil into the combustion chamber like worn-out rings, cylinders or valve stalk seals.
• And so, cheque the spark plug wires and ignition coils with the assist of your vehicle repair manual.
• If your engine uses a distributor, check the cap as well for cracks, carbon traces, and oil contamination.

Bad canister vent valve:

The evaporative emissions (EVAP) control arrangement routes fuel vapors into a canister and so to the intake manifold where they are burned forth with the air fuel mixture.

Only a system failure, particularly a failure of the canister vent valve, can cause the engine to stall at idle or during dispatch. Consult your vehicle repair transmission for valve testing procedures in your item vehicle model.

Other system components to check, depending on your item model:

• purge solenoid or valve
• canister
• relief valve
• hoses

Checking the PCV Valve:

The positive crankcase ventilation (PCV) system purges blowby gases from the engine. Most PCV systems make use of a small valve to route blowby gases back into the intake manifold to be re-burned. Over time, the valve may get stuck open, causing too much air to catamenia into the intake manifold during idle or acceleration, which tin can crusade the engine to stall.

Yous can easily remove the valve and check information technology by shaking the valve. If the valve doesn't rattle, probably the valve is stuck. But this mutual exam doesn't work for all models. Consult your vehicle repair manual, if necessary.

A Bad Throttle Position Sensor (TPS)

The TPS monitors the angle opening of the throttle valve and sends this information to the electronic control module (car computer). The figurer uses this information, along with signals from other sensors, to arrange air-fuel ratio, ignition timing and other outputs.

Virtually TPS units use a variable resistor with several contact points that can wear out and fail after miles of service. When the contacts open, it may cause the computer to lean the mixture also much and stall the engine. A bad TP sensor usually triggers a diagnostic trouble code (DTC). So you lot can retrieve the code from the estimator using a scanner tool.

Whether or not you find a trouble code for the TPS, it'due south a good idea to examination the sensor using a digital multimeter:

1. Unplug the sensor electric connector.
2. With the engine off, mensurate resistance across the sensor terminals with the throttle in airtight position, at half throttle, and at full throttle.
3. Compare your resistance measurements to the specifications listed in your vehicle repair manual.

Ane or more than bad fuel-injection components may cause the egnine to stall.

Photo courtesy of Vegavairbob on Wikimedia

Checking the IAC (for Engines With Multiport Injection Systems, Near Modern Engines):

In most cases, the trouble here is associated with the idle air control (IAC) valve.
The IAC valve is controlled by the computer and allows air to featherbed the throttle valve under idle or cold temperature conditions to prevent a crude idle or keep the engine from stalling. You can examination the IAC valve using a digital multimeter:

1. First, unplug the IAC electrical connector.
2. Plough the ignition key to the On (run) position merely don't offset the engine.
3. Prepare your voltmeter to 20 Volts range (or above 15 Volts) on the DC (directly current) scale.
4. Connect your blackness meter lead to basis (engine metal surface or battery negative mail service, for example) and with the cherry-red meter lead probe the terminals on the harness side.
5. You should get effectually 10 to 12 volts, approximately, from one of the terminals. This is the incoming point from the engine control module (car computer). If not, there are bug in that side of the excursion.

Now measure the condition of the valve by measuring resistance across the IAC connector terminals.

1. Set your voltmeter to ohms for this measurement.
2. Yous should go anywhere from six to 13 ohms of resistance.

To check for a possible internal short:

1. Cheque for resistance from each IAC connector final and the IAC valve body with your voltmeter.
2. Y'all should get effectually ten,000 ohms of resistance.

Checking the internal physical condition of the IAC valve:

A blocked IAC may crusade the engine to die as presently equally it starts if the valve sticks close. IAC valves may fill with carbon deposits overtime, preventing the pintle from moving, or blocking valve passages.

On about vehicle models, the IAC valve is readily accessible and can be removed easily past unscrewing a couple of mounting bolts.

1. Showtime, plough the ignition key off and remove the primal.
2. Unplug the IAC valve electric connector.
3. Unscrew the valve mounting bolts and remove the valve from the vehicle.
4. Check the valve's pintle and housing for carbon buildup. If necessary, clean the valve with carburetor cleaner and a soft rag to remove deposits.
5. Also, check the valve O-ring. It should be soft and in good condition. Otherwise, supervene upon it.

Consult your vehicle repair manual for the recommended testing procedures for your particular vehicle model, if necessary.

Your item fuel injection system may have other necessary adjustments. For case, you may need to conform

• the idle speed
• the throttle cable
• the throttle plate terminate
• the idle air-fuel mixture

Consult your vehicle repair transmission, if necessary.

Troubleshooting the ECT (Engine Coolant Temperature) Sensor

The ECT measures engine operating temperature and sends this data as electrical information to the figurer. The machine computer uses this information, and information from other sensors, to adjust ignition timing for better engine efficiency.

Thus, a bad ECT sensor can take a direct impact on engine performance. If the sensor causes a lean air-fuel mixture the engine may idle rough or stall.

Most ECT sensors use a thermistor to vary the voltage signal sent to the estimator according to engine coolant temperature. The higher the coolant temperature, the lower the sensor resistance and higher the bespeak voltage.

To test the ECT sensor:

1. Locate the sensor. It'due south usually close to the thermostat housing.
2. With the engine turned off and cool, unplug the ECT sensor electrical connector.
3. Set up your digital multimeter (DMM) to the ohms scale and measure resistance across the sensor terminal. Make a note of the resistance value.
4. Plug in the sensor electric connector and start the engine. Let the engine idle for virtually 15 or 20 minutes so that it reaches operating temperature.
5. Shut off the engine.
6. Unplug the ECT electric connector and measure resistance across the sensor terminals every bit you did in stride 3.
7. This time, sensor resistance should be considerably lower. For case, depending on your detail sensor configuration and engine model, the sensor may take 40K ohms when the engine is common cold only 2K ohms when hot.
8. Compare your results to the specifications listed in your vehicle repair transmission.

A failing ECT sensor can trigger the check engine light. If your sensor checks Okay during your tests, merely the computer says there's a problem with it, check the sensors excursion between the ECT and the computer for bad connections or damaged wire.

Also, cheque that the computer is sending the correct reference voltage to the sensor.

• Unplug the ECT sensor electrical connector.
• Plough the ignition key to the On position, but don't kickoff the engine.
• Measure the voltage at the harness connector (the one leading to the computer) with your voltmeter.
• Usually, you should read virtually 5 volts at the connector. If not, in that location's a problem in the circuit.

Checking for a Stuck EGR Valve

The frazzle gas recirculation (EGR) systems reintroduces frazzle gases into the combustion chambers to reduce engine temperature and poisonous emissions.

It is common for the EGR valve passages to get blocked from carbon buildup. Carbon deposits may prevent the valve from endmost, causing the engine to stall at idle. Also, an EGR valve may leak through the base, causing the engine to stall at idle, at deceleration, or during a quick finish.

If you've never checked under the valve, or it's been a few years since you last checked, it might be a good idea to take a expect at present. But make certain to have on hand a gasket replacement. Yous may demand to install a new one. If you can't discover one for your particular vehicle model, you even so can buy gasket paper at your local automobile parts store and make the gasket yourself.

• About EGR valves are attainable and not difficult to remove. Check the EGR valve configuration for your particular model, though, to make certain you accept all the tools necessary for the job. Usually, all you lot need is a couple of wrenches, a ratchet, the appropriate socket sizes and, sometimes, a pipe wrench to disconnect the valve from the exhaust pipe. Consult your vehicle repair transmission, if necessary.
• Remove carbon deposits from nether the valve and intake ports using carburetor cleaner. Brand sure non to allow carburetor cleaner to accomplish the valve diaphragm or any electrical circuits, depending on your particular model, or you may ruin the valve.
• Reinstall the valve using a new gasket, if necessary.

Checking the EGR Valve:

Depending on your particular EGR valve configuration, you lot probably can stick your finger through the underside of the valve and try to move the internal diaphragm. If the diaphragm doesn't motion, information technology may exist stuck.

Here are a couple of culling methods to cheque for diaphragm movement:

• Operate the accelerator linkage with your hand to increase engine speed. You may be able to see the diaphragm moving using a mirror placed nether the EGR valve. If you tin can come across the diaphragm with the mirror, but you can't see it moving as yous operate the accelerator linkage, the diaphragm might be stuck.
• Yous can also use a hand-held vacuum pump. Y'all can do this test with the engine off and using a mirror to watch diaphragm motility. Disconnect the vacuum hose form the valve and connect the vacuum pump instead. Apply about 15 in-Hg of vacuum to the EGR valve while watching for diaphragm motility with the mirror. If the diaphragm doesn't motility, it might exist stuck.

Another crusade for the valve diaphragm to fail is wear or damage that causes information technology to leak exhaust gases. A quick way to test for a leaking diaphragm is using carburetor cleaner.

• Block the wheels using wooden blocks.
• Set your transmission to Park (automatic) or Neutral (standard).
• Start the engine and pop the hood open.
• Spray a quick burst of carburetor cleaner nether the valve, towards the diaphragm.
• If the engine RPMs increase when y'all spray, the diaphragm is leaking and you lot need to replace the valve.

Bad Catalytic Converter

A bad catalytic converter tin as well cause y'all bug at idle. Depending on the particular problem, it may show other symptoms also:

• a olfactory property of rotten eggs
• rattling sounds
• poor engine power

One of the most common bug with a catalytic converter is a plugged unit. The internal substrate becomes partially restricted or disintegrates.

Unremarkably, bug with the catalytic converter trigger the bank check engine light (CEL). The computer may shop a P0420 through P0423 code. If yous notice a catalytic-converter-related lawmaking, practice troubleshoot the catalytic converter before replacing it, to ostend that the cat is in fact bad. Catalytic converters are expensive and you need to brand sure that some other components is not involved in the problem. If necessary, consult your vehicle repair manual.

Checking the IAC on Vehicle Models With Throttle Body Injection (TBI) Systems:

Many vehicles equipped with TBI systems also have an IAC valve controlled by the estimator.

• You tin can employ the test described in the previous department, if your vehicle has an IAC valve.
• Besides, some of these systems may have an idle speed adjustment (consult your repair manual),

Unremarkably, you tin can adjust idle speed by hooking up a tachometer (some digital multimeters have this feature) to the engine. Then, y'all can turn the idle speed screw on the throttle torso or carburetor until the RPMs are fix according to specifications.

Carburetor worn out components tin can crusade the engine to die.

Photograph courtesy of Uberprutser on Wikimedia

Diagnostics on Vehicles With a Carburetor

A stalling event commonly points to a maladjusted idle mixture screw. To reset the screw:

1. Locate the idle mixture screw.
2. With the engine off, lesser the screw.
3. Back out the screw 2 1/2 turns.
4. Starting time and idle the engine.
5. Brand the final adjustments until you get a smooth idle.

On some carburetor models, y'all may as well demand to arrange adjourn idle speed. Consult your repair transmission.

On carburetors in demand of maintenance or worn parts, there tin can exist several components that need attention. For example, yous may demand to check:

• throttle dashpot aligning
• bowl fuel level
• idle system for clogging
• carburetor flooding
• vacuum leak
• float needle valve operation
• brake in the air cleaner

Consult your vehicle repair transmission.

Sometimes, using the accelerator pedal can proceed your engine from stalling.

Photo courtesy of ScrewsHirsch on Wikipedia

3. If the Engine Stalls at Idle Unless Y'all Printing the Accelerator

This may indicate problems with the fuel system. The post-obit video shows an engine with this problem.

If your engine has a throttle body injection (TBI) organisation:

1. Pop the hood open and remove the air cleaner assembly so that you take access to the throttle body.
2. Turn the ignition key to the On position but don't start the engine.
3. Take a look at the injector(due south) on top of the throttle trunk.
4. If the injector(south) is leaking fuel, then you lot demand to supercede it. The injector may accept a worn or inoperative return spring or valve; or dirt may have the valve stuck in the open position.

Too, check fuel system pressure level using a fuel pressure approximate. Consult your vehicle repair manual.

If your engine has multiport fuel injection system:

Checking fuel injectors for leakage on this type of organisation tin can be catchy, depending on your item vehicle and engine model. Consult your vehicle repair transmission about detaching the fuel injectors from their ports for inspection, if necessary.

Another potential problem could be the fuel pressure regulator.

1. Locate the pressure regulator on the fuel rails.
2. Disassemble the vacuum hose from the force per unit area regulator
3. Closely inspect the regulator port and inside the vacuum hose for signs of fuel
4. If you detect gasoline in either component, supersede the fuel pressure regulator.

Fuel delivery system leaking:

Although rare, the cause of a stall may come from a leak in the fuel commitment system, specially the fuel pump. The engine may receive fuel but non plenty to go along the engine running.

The leak may exist located in the fuel pump assembly, or along the way up to the fuel rail.

Check for strong fuel odors or moisture spots around the fuel rail, fuel hoses and tubing, effectually connectors. Also, you may need to check the fuel pump associates.

See your repair manual for more fuel arrangement tests, if necessary.

A bad electrical excursion in a curl or ignitino moduel may cause the engine to stall when warm.

Photograph courtesy of Cschirp on Wikimedia

Four. If the Engine Starts But Stops When Warm

An engine can likewise stall when reaching operating temperature or a few minutes after a cold start.

Sometimes, this can be a sign of problems with an:

• ignition scroll
• ignition module (depending on your vehicle model)
• fuel pump
• crankshaft position (CKP) sensor
• camshaft position (CMP) sensor

It usually happens when an electrical "open up" exists in the internal circuit of 1 of these components. Afterward a few minutes of operation, heat may cause a coil or wire to expand and loose electric contact. Y'all may not be able to outset the engine again until the heat in the troubled component has dissipated. Later, when heat causes the open to manifest itself again, the engine may stall again.

Trying to find the faulty component can be difficult. Just hither are a few unproblematic procedures to go you going.

When the engine dies, check to see if y'all take spark:

1. Disconnect one of the spark plug wires from its spark plug.
2. Place the tip of the wire about ii inches away from the engine surface or a metal bracket using a pair of insulated pliers.
3. Take an assistant creepo the engine and see if at that place's spark.
4. You should see a strong, blue spark between the tip of the wire and ground.
5. If there's no spark or yous need to accept the wire about 1/4 inch close to ground for a spark, probably the mistake is with the ignition module, ignition coil, CKP or CMP.

When there's spark, bank check for the presence of fuel:

1. If you lot have a fuel force per unit area gauge or tin can infringe one from your local auto parts store, connect the guess and idle the engine.
2. Monitor the gauge and see if the fuel system looses force per unit area when it stalls. If information technology does, you may have issues with the fuel pump or a system component.

You can also check for weak fuel force per unit area using this simple method:

1. When the engine stalls, remove the air cleaner assembly and spray some carburetor cleaner or starting fluid at the throttle and try to start the engine or take an banana creepo the engine while you spray a burst of carburetor cleaner into the throttle body.
2. If the engine catches or starts for one or ii seconds when y'all spray the fluid, and then you may accept a trouble with the fuel pump or another system component.

Check the fuel system with the help of your vehicle repair manual.

A bad circuit in a CMP tin forbid the engine from idling.

Photograph courtesy of Teresa Trimm on Flickr

V. If the Engine Stalls Intermittently

If your engine stalls intermittently, under a variety of conditions, suspect these components:

A Bad Camshaft Position Sensor

A bad camshaft position (CMP) sensor tin produce different types of symptoms and cause the engine to stall immediately after starting or intermittently.

A bad camshaft sensor is probable to trigger the check engine light (CEL). Even if y'all don't run across the CEL illuminate, browse the computer memory for diagnostic problem codes (DTCs). Common bad camshaft DTCs range from P0340 to P0344.

Consult your vehicle repair manual to locate and test the camshaft sensor, if necessary.

Misfires

Engine misfires are another cause for an engine to stall. Misfires make popping sounds and can crusade engine to wiggle or vibrate. Other symptoms include:

• increased emissions
• increased fuel consumption
• difficulty starting
• stalling

If you've noticed engine misfires, this might exist the cause for the engine to stall. Cheque this other article to assistance you lot diagnose the source of the misfire.

Clogged air filter

You tin remove the air filter and check it. Air filters trap clay and dust from the stream of air flowing into the intake manifold. To bank check the filter:

1. Remove it from its housing.
2. Identify the filter confronting the sun or a good source of light.
3. If the light tin can barely become through the filter element, or not at all, the filter is chock-full and preventing proper air flow into the engine, causing it to stall.

Vacuum Leaks

An engine stalling issue tin besides come from a vacuum leak trouble.

A vacuum leak tin upset sensors or actuators that depend on vacuum for operation: for case, the manifold absolute pressure (MAP) sensor, exhaust gas recirculation (EGR) valve or mass air menstruation (MAF) sensor. The leak tin can happen because of loose or damaged hoses or gaskets.

Testing one of these sensors requires checking the vacuum hose, electric connexion and wires, and testing the sensor itself. Consult your vehicle repair transmission. On a MAF sensor, check for a muddy sensing chemical element. You can clean the sensing element using MAF sensor cleaner or electric contact cleaner. Follow the product instructions when using this type of cleaner.

Vacuum leaks unremarkably make a hissing sound merely you may need a mechanics stethoscope or a length of hose to listen and locate potential vacuum leaks.

• Check that all vacuum hoses are properly connected.
• Check the condition of each hose.
• Employ the stethoscope or length of hose to listen for leaks along the vacuum hose and connections.
• Trace each hose with your hand to feel for potential damage: soften, harden or irregular spots.
• Check for vacuum leaks around the intake manifold gasket and throttle torso likewise.

It'south Worth Trying to Diagnose An Engine That Shuts Off

If your engine starts only won't stay running, you desire to make an authentic diagnosis as presently equally possible. Making a diagnosis tin be hard, especially when y'all don't have much feel in car repair and the source of the trouble can exist in one of several systems. Use the strategies outlined in this guide. They'll help you repair your car faster past having yous concentrate on those systems more than probable to give you trouble.

This content is authentic and true to the best of the writer'southward cognition and is not meant to substitute for formal and individualized advice from a qualified professional person.

Questions & Answers

Question: Where is the problem when, afterwards driving, I stop and information technology doesn't start until I give some time. How would yous diagnose my car'due south problem if my motorcar will start again after some time?

Answer: If the engine cranks simply won't start, check for spark and fuel force per unit area. If it doesn't crank at all, check the bombardment condition.

Bank check for DTCs codes, even if you haven't seen the check engine light come on. At that place might be a pending code. Commonly, when the engine warms up and then stops, it is an indication of a problem with an ignition gyre, ignition module or even the fuel pump. Allowing time to absurd, the component will function again. Endeavour some of the tests described in section IV of the post.

Question: What does it hateful when the auto gets started when it is common cold but not when it is hot?

Answer: Cheque the connections, wires and cables in the staring excursion. They should exist clean and tight.

Question: Why does my auto shut off when I let go of the key?

Answer: In that location could be a trouble with the ignition switch. Proceeds access to the ignition switch and run into if the harness connector is getting loose. Push button the connector and switch together and endeavour to start the engine and encounter if it stays running. If so, you may want to use a large plastic tie to secure the connection. Or you may need to replace the switch.

Question: My truck starts and within half dozen seconds it dies. I cannot provide more gas to keep it running. If I unplug the Air Flow sensor it volition start and idle but again if I give it gas it dies. I also started with changing out the fuel filter. No divergence. Any thoughts?

Answer: If yous are able to start the engine right after it stalls with the MAF sensor disconnected, probably this sensor is dingy or faulty or another sensor is not sending the correct betoken the computer expects, probably the throttle position sensor. Download problem codes fifty-fifty if you don't see the cheque engine low-cal on. There could be a awaiting code that can aid you.

Question: I have a 1993 Caprice Archetype. And about 4 months ago, I mistakenly put the incorrect grade of gas in. Since and then, I've had issues as far as when upon starting it idles very low and then too high until it does usually afterward about 30 or so seconds. Once I drive it, I can go so far, and once I come to a calorie-free or stop sign it eventually cuts off but starts back up immediately. I've heard that it could exist a number of things including bad fuel injectors. What's your expert opinion on this?

Answer: It seems similar an electric problem. Try downloading trouble codes, even if the engine lite doesn't come on. There could be a problem with a sensor.

Question: My car starts and the check engine lite disappears. As the engine temperature rises, the check engine lite appears and my car dies. What'southward the answer?

Answer: Check the computer for trouble codes. If a sensor is faulty, most likely it'south triggered a code. With temperature-related issues, an ignition coil, fuel pump motor or sensors like camshaft and crankshaft are mutual.

Question: 90 Chevy. I replaced the fuel pump, fuel filter, fuel pump relay and throttle control position sensor. Truck dies at random. If watching the throttle body when running, fuel simply stops. I cycle the cardinal and information technology works again. If I don't bicycle the key, no fuel comes out. Any ideas?

Reply: If the engine dies equally if turning off the ignition key, near likely the trouble is a loose wire or bad connectedness either on the fuel pump circuit or throttle position sensor circuit. Double-check those circuits, including wiring harness and connectors. Cycling the key may betoken to corroded or loose wire(south) that have too much resistance and are getting hot. Visually check for corrosion and tug at the wires on the connectors to brand certain they are not loose or dingy.

Question: May car engine stalls while idle unless y'all printing the accelerator. This indicates problems with the fuel system. How do yous fix the fuel system?

Answer: If y'all know the problem is in the fuel system, beginning make certain you accept replaced the fuel filter. Then get-go by testing for fuel force per unit area at idle. This other post can assist:

https://axleaddict.com/motorcar-repair/How-to-Exam-a-F...

This could lead to a bad force per unit area regulator or fuel pump or bad injector(s).

Question: When I try to start my Mazda, it takes several times of information technology trying to turn over then it starts. But sometimes information technology shakes and makes loud noises and cuts off unless you lot press the gas a piffling bit. Then information technology's proficient. The fuel pressure was checked and information technology is good. Why would my Mazda accept trouble starting?

Respond: Seems like there is a problem with a sensor or the starting circuit. Effort downloading any possible problem codes, fifty-fifty if the check engine low-cal is not on. This other post may aid as well:

https://axleaddict.com/auto-repair/How-to-Use-Volt...

Question: I take a 2005 Park Avenue that keeps stalling randomly. At start, information technology would only stall while warming upwards but ran fine after it was restarted. At present, it starts and volition stall while driving. Sometimes I can drive beyond town before it stalls, and sometimes I can simply make information technology a few blocks. After information technology stalls, I accept to await near an hour earlier I tin keep it running. Should I start with the creepo position sensor?

Answer: Check your camshaft position sensor. At that place are other items you lot demand to check as well similar misfires, vacuum leaks, and a blocked air filter.

This other post on vacuum leaks diagnosis may assistance.

https://axleaddict.com/auto-repair/How-to-Find-and...

Make sure to browse your computer memory for trouble codes, even if the check engine light is not on. At that place could be pending codes that may guide yous here.

If the engine stalls after information technology reaches operating temperature (about 15 to twenty minutes), at that place could be a trouble with the fuel pump or an ignition module.

Question: My automobile won't plough over. I used starting fluid and it started upwards, then immediately cut off. What can be the reason for that?

Reply: If the engine doesn't turn over, there could be something wrong with the starter motor or the engine is seized. Merely, if the engine fires upwards with starting fluid, then check for fuel pressure. Probably not enough fuel is getting to the cylinders.

Question: My motorcar runs fine for a few minutes, then starts sputtering and loses a lot of horsepower. It doesn't stall but the engine sounds rough similar an old 80s car. A night of residue lets the automobile go drivable again for a few minutes simply and so the issues show upward again. I've changed the spark plugs, plug wires, distributor cap and rotor, air filter, cleaned the maf sensor and inverse the throttle position sensor. What else could exist the problem?

Reply: The trouble seems to be temperature related. This usually happens with a faulty ignition coil, ignition module or fuel pump motor's coil. The coil device or temperature sensitive electronics volition begin to fail from an electric open up. Have the ignition ringlet, ignition module and/or fuel pump checked.

Question: Why does my car start and idle for 3-5 minutes before dying? The spark plugs and fuel filter were replaced. The carburetor was taken off, checked and cleaned. The benefactor was taken off and cleaned too. Information technology still does not want to idle entirely subsequently starting, so information technology cannot drive at all. Please help as the mechanic can't seem to effigy out whats wrong with my motorcar.

Answer: At that place could exist several causes for this, so effort the following:

Have the ignition system checked to make sure it has a good spark.

Check the fuel system- fuel pressure level

Check the canister vent valve, PCV valve, TPS sensor, and IAC valve.

Question: My VW T4 runs completely fine, only when it's been in hot weather, or indeed clammy weather, it starts and instantly dies. This is intermittent. Sometimes afterwards it dies, if you lot effort again it can first straight away, or you tin can be waiting for half an hour before you can first it. Once started information technology runs fine. Do y'all have whatever ideas?

Respond: Usually, when a auto struggles to run in damp atmospheric condition, the problem is with the ignition arrangement. A roll or cable in the system is probably leaking the spark to footing.

Question: My car was diagnosed as having a bad fuel pump. After a new fuel pump was put in, information technology got four miles down the route, idled out, and died again. The car will not crank until nearly fifteen minutes after it happens. What do you recollect could be the cause of this trouble?

Answer: If you mean the engine will not turn over, the trouble seems to be in the starting organization circuit. This other post may help:

https://axleaddict.com/automobile-repair/bad_starter_sym...

If the engine cranks but won't kickoff after the car has been driven near iv miles (engine turns over only won't get-go), then possibly the ignition coil or ignition module is bad. In this case, the coil reaches operating temperature, coil breaks open and the car stops. Once the curl cools, the cleaved wire makes contact and you are able to start the engine, and the cycle repeats.

This other post may help y'all test the ignition coil:

https://axleaddict.com/auto-repair/How-to-Test-an-...

If your car has a roll on plug configuration, check the repair manual for your particular model to test the coils. You can also check for spark correct subsequently the engine refuses to beginning. If at that place's no spark, you lot know the problem is in the ignition system (or crankshaft-camshaft position sensor) and you are on the right track.

Question: I have a 2013 Chevy Sonic. For the last 5 months, my automobile has stalled during driving and when in idle or when I stop at cherry-red low-cal and end signs. Also, it fails to turn over later on putting gas. It will turn over fine, merely information technology won't stay on. I've had my fuel injector cleaned and inspected. I've had my O2 sensor replaced too. Do you have whatever ideas what this could exist?

Answer: You may be dealing with a vacuum leak or a faulty sensor similar a MAP or MAF sensor. You lot may also have a trouble in the fuel system or with the fuel pump. Have the pump checked before replacing it.

Question: What can make a car just switch off and the battery lite to go along in the instrument panel? I accept tested the battery and it is good.

Respond: The most mutual reason for this is a bad alternator. Have the charging system tested.

Question: Why does my car only start in the morn?

Answer: Cheque for any DTCs in the calculator memory first. Yous may need to take a look at fuel pressure or ignition spark afterwards the car has warmed up. Maybe there's a problem with the fuel pump or an ignition scroll.

Question: What would be the problem if the engine dies at intersections when reverting to first gear? I replaced the carburetor.

Answer: The carburetor may need an idle aligning. Check the manual, if it came with it. Or await for it online.

Question: Two days agone my truck close off immediately after starting information technology upward. The truck will accelerate by itself then shut off. It fails to restart afterward a few tries then it will start and run. Ii months ago, it shut off while driving, so I replaced the battery and alternator and no problems for two months. What could cause my truck to shut off after starting upward?

Answer: It seems like a faulty sensor. Intermittent faults tin can be hard to diagnose, though. But yous may want to cheque the bombardment cables, engine grounds, ignition switch connector, and wiring, and faulty wiring in a disquisitional sensor the reckoner relies on to operate the fuel injectors, crankshaft, throttle position sensor or camshaft sensor, for instance. If the engine shuts off equally if turning the ignition switch off, well-nigh likely the problem is in a circuit. A voltage drop test might assist:

https://axleaddict.com/car-repair/Automotive-Volt...

Question: When I cease the car and and then come up back to information technology after but a brief menstruation of time, information technology volition only stay on if I recall the engine. But once I can go it going for a little flake, information technology stays on and runs corking and idles amend than it has in years, but no one touched anything on the engine. Is it the fuel commitment or something more sinister?

Answer: Doesn't seem like a fuel organization issue. Probably an event with the idle air control (valve or solenoid) or a sensor, possibly the throttle position sensor, that is non sending the right indicate to the computer. Try downloading trouble codes, even if the check engine is not on. There could be a awaiting code. You may also be dealing with a bad wire or connector.

Question: Why does my engine crank but won't stay running?

Answer: At that place could be a mistake in the injection or ignition arrangement, a vacuum leak or some other fault. Cheque for trouble codes, fifty-fifty if you don't see the bank check engine lite on. A sensor might be faulty besides.

Question: I had the fuel injectors cleaned, fuel pump checked, relay checked, new MAF sensor, new Crank and camshaft sensors, new ignition switch, and cleaned the throttle body with a carb cleaner. The alternator is proficient. New starter. It hard starts with starter fluid; I pushed the gas pedal a good 10 times with null reaction from the rpms. Then the automobile died seconds later. I cannot figure information technology out. What could it be?

Answer: It seems like a bad sensor. Try downloading trouble codes and encounter if you become a awaiting code, even if the check engine lite is not on. There could be a problem with the throttle position sensor (TPS). If the computer doesn't get a signal from this sensor, it may not fire upwardly the engine.

Question: With the car on jacks on an incline, the engine was running fine. I tried to bulldoze information technology to a shop the adjacent mean solar day. Information technology started fine, but within a minute it just close off. No alarm or sputter, simply dead. I pushed information technology dorsum to the inclined driveway and then it started fine. Could it be that what petty oil was in that location pooled up towards the back of the engine and wasn't getting to the pump?

Answer: Some models will close off the engine if at that place'south not plenty oil pressure level. This is a safety measure to prevent severe engine damage. If in that location's not enough oil, add some and try again. If yous think in that location's a problem with oil pressure, this other mail may help:

https://axleaddict.com/automobile-repair/What-Causes-Low...

Question: I have a 2012 Ford Focus. After getting gas and well-nigh 10 miles (16.09 km) downwards the road, the motorcar started to lose power and and then stalled. Got it started, drove a little and it did the same affair. Finally, I made it home. It stalled again and at present won't start at all. I never had a problem until I put gas in information technology. My Ford mechanic said I need a new calculator system. Could my Ford Focus' loss of power be something other than the computer system?

Answer: First, make sure you got fuel pressure (bad fuel pump or fuel pressure regulator, clogged fuel filter). Download trouble codes, even if the engine light is not on. There could be a pending code on the computer'due south memory. A bad sensor can prevent the engine from starting, like a faulty crankshaft, camshaft or throttle position sensor.

Question: My engine starts, so afterwards a few seconds engine is off by itself. And then the dashboard displays an auto protection alarm. What could exist the cause of this remark?

Answer: The bulletin comes from the automobile's computer. It'due south trying to protect the engine because of a serious error it has detected. Download the trouble codes from the estimator retentivity. They should requite you an indication of the problem.

Question: My engine is a Toyota 5A FE and has no problem starting at home (outdoor Street parking) fifty-fifty on a very common cold morning. However, it cranks and instantly stalls when I try to first it at piece of work and just when I'k at work (Covered Parking). Whatsoever reason why that might exist?

Answer: It'south possible the EGR or PCV valve is sticking open.

https://axleaddict.com/machine-repair/Bad-EGR-Valve-Due south...

https://axleaddict.com/auto-repair/How-to-practice-a-PCV...

Download trouble codes, even if you don't see the check engine light on. There could be a problem with a sensor as well. Hope this helps.

Question: When, after driving, I stop, it doesn't start and the engine low-cal comes on until I give some time. How would yous diagnose my auto'south problem if my automobile volition start again after some time?

Reply: Offset by downloading problem codes. If the check engine light is coming on, there could be a faulty sensor triggering the light. Make sure to test the system or sensor indicated past the code before replacing any components. Hope this helps.

Question: My gear shift lights are non indicating on the gear after changing the gearbox and mechatronics. And we are failing to kickoff the car Golf 5 ane.9 TDI. What could exist the trouble?

Answer: If the engine is not cranking, there could be a problem in the starting circuit, perhaps at the ignition switch. That could also explicate why you are not getting the indicator lights. This other mail service may help:

https://axleaddict.com/motorcar-repair/How-to-Apply-Volt...

it'll exist a adept idea to have the diagram for your particular model. If you don't have the repair manual, yous tin can get 1 at your local machine parts store or online.

Question: My engine starts and runs at loftier idle, But volition non idle once warmed up. The just style I can keep information technology running is to up the rpm to around 1200 or more. I accept checked plugs, wires, vacuum lines, replaced coil. I removed the gas line from carburetor and I can fill a canteen slowly equally I turn the engine over - mechanical pump. Should I supplant the carburetor? It is a 4 barrel Rochester Quadrajet.

Answer: If the engine starts at high idle and then dies while it gets warmed, it's possible there is a vacuum leak. If you detect a drop in RPM before it dies, the choke may need adjustment (too tight), the carburetor may be flooding, or the float level is very high.

Question: My BMW 1 series cuts off while driving, the engine will start and cut off afterwards few minutes, what could exist the problem?

Reply: This other post may help:

https://axleaddict.com/auto-repair/Car-Dies-While-...

Question: Hyundai ix35 2013 auto. The motorcar starts and dies. I took out one of the airflow sensors and started the car. It remains on just as soon every bit I put the sensor dorsum, the automobile dies. Delight advise?

Reply: Well-nigh likely the air flow sensor is faulty. Effort testing the sensor and, if necessary, the circuit, to brand sure it'due south bad. This other mail service may help:

https://axleaddict.com/auto-repair/How-to-Test-a-1000...

Question: My motorcar does not stay running until it comes up to operating temperature, what could be the problem?

Respond: There could be a problem with the MAF sensor not sending the correct signal to the calculator.

https://axleaddict.com/auto-repair/How-to-Test-a-M...

Normally, cleaning the sensor chemical element solves the problem, using a MAF sensor cleaner. Other times the sensor itself has failed and needs replacement.

Other sources of trouble are the throttle position sensor,

https://axleaddict.com/auto-repair/How-Do-You lot-Know...

bad fuel pressure

https://axleaddict.com/auto-repair/How-to-Exam-a-F...

engine coolant temperature sensor

https://axleaddict.com/car-repair/Coolant-Tempera...

stuck open thermostat

https://axleaddict.com/car-repair/car-thermostat-...

Question: Would a speed sensor cause stalling?

Answer: Usually, you'll notice issues with the manual, brakes, speedometer, and check engine light. Try downloading problem codes from the computer, even if you don't run across the bank check engine light on. If there are no codes, this other postal service may help:

https://axleaddict.com/motorcar-repair/No-Trouble-Lawmaking...

© 2022 Dan Ferrell

jimenezdercy1948.blogspot.com

Source: https://axleaddict.com/auto-repair/Why-My-Engine-Starts-But-Stops

Share this post