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Anonymous Posted on Aug 18, 2009

Cold starts ok warms up shakes and stalls

The engine and tranny shakes looses power and shuts off only cold starting runs ok

  • Anonymous Mar 17, 2014

    When motor warms, the motor shakes on stop to go acceleration. Runs great on cold starts.

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  • Master 631 Answers
  • Posted on Aug 18, 2009
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Joined: Jul 28, 2009
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Check engine coolant temperature when it gets warmer, or at operating temperature, and verify that the temperature gauge is showing warmed up to operating temperature. If the coolant temperature sensor tells the computer the engine is cold it will over fuel and miss and the engine will die. When cooled down it will run fine until it warms up. Also could be coil if it starts missing after warmed up.

Testimonial: "we found a hole in the freeze plug causing the heat and we agreebwith his dignosistmthax much help love your site (the emergency crew Sf ca)"

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1answer

Starts right up but once it warms up it dies have messed with the air gas screws that's fine don't know what the problem is

My car runs good when it's cold but stalls once it warms up ...

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Troubleshooting an Engine that Stalls at Idle When Warm ...

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Cold start stall, and stalling after warm.

is the check engine light on? If so, have an auto parts store retrieve the codes.
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97 3.9 dakota when it's cold outside and I start my truck it'll start right up but idle down til it quits . Start it again and it will idle.. Go down the road and it misses bad until it warms up. After it...

Here are the most common causes of idle surge, rough idle esp when cold and stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

0helpful
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The car runs well until it gets hot ,it begins to loose power,then is stuter,then shut off. the car makes a coughing -like sound when it shuts off

could be your crank angle sensor to test .turn car on then let it warn up till it cuts out then tip cold water or hose for a couple of mins on the crank angle sensor then stop water and turn car on . if it buggard it will start as when the crank angle senors breaks or is on its way out it will start then idle for a bit then splutter run **** then stall with the cold water it instantly makes it cold again so it will start straight away and repeat the same process of stallin when warm
4helpful
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As you've probably heard before my 91 cav starts fine gets warm stalls at lights starts right back up but cuts off when i put it in gear

pull off the transmission transition switch wire pluged on to tranny
start car drive should be fine never hook op again 0 money
or pay 700 dollars to install a new one
or buy switch pull tranny and install your self
0helpful
3answers

I have a 94 buick la sabre stalls when warm has spark no fuel pressure also loses power to power windows and locks,when car sits it will start and windows and locks will also work.runs a little while and...

Sounds like you a loose 12V connection at the relay box.Locate the relay box and when the engine is running wriggle the wiring harness or shake the relay bow and see if that's when the engine stalls. You may even have a bad / loose ground to the relays.
3helpful
1answer

Tranny causes engine to stall when tranny warms up

if it feels like your driving a standard transmission ,and "you came to a stop light without pushing clutch in"
that will be the torque convertor lock up,
0helpful
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2001 Dodge Ram Magnum 360 gas stalling also!

1.Start by changing plugs and wires. 2.Check for vacuum leaks. With the engine running, wigglr every hose you can see, to make sure nothing is loose or cracked. 3.Change fuel filter. 4.Check timing. 5.Check air control valve. 6.Check idle control sensor.
0helpful
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4 cyl Engine starts and idles ok...give it throttle and it dies

I need to get a clear mental picture of what exactly is happening.

With this said, you stated that the car "runs fine" until warmed up.

Q: When you start the car when cold it idles fine?
Q: If you allow the car to idle until "fully" warmed does the car stall?
Q: As the car begins to warm up, Does the RPM fluctuate abnormally?
Q: Does the car Only stall when you press on the gas pedal or does it stall just sitting and idling in addition to pressing the gas pedal?
Q: If you can drive it while cold does the car stall during acceleration when warm or only at Stop Signs / Lights?
Q: If you wait 20min or so, can you start the car again?
Q: How many miles are on the car?
1helpful
1answer

Car not idling adn stalling when it is cold

sounds like the idle control vale is sticking when it is cold. It is located on the throttlebody right at the air inlet
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