Question about 1993 Jeep Grand Cherokee

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Motor stalls out and wont idle

My motor runs fine, but the issue is, say you put in park or cometo a stop the motor should idle, but it just dies out, what is causeing this issue and how do i fix. It just started happening. I put new wires in an plugs a few days a go, everything ran perfect. now today when i say turn and the motor should hit the idle speed it dies out. Its a v8 5.2 liter awd 318cubic inch motor if that makes an issue. any suggestions

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  • 43 Answers

Check for vacuum leaks if none replace the idle air control motor

Posted on Sep 26, 2008

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I have a 1988 GMC 1500 with a 305 the problem is that it wont idle I found that if I pull the vacum line off the MAP sensor it is fine for 30 seconds then dies I got a new map sensor and nothing chan


Change the PCP valve and run the heater. This should take care of it. You only have to run the heater one time as this is controlled by the vacuum system. This will cause your motor to run proper.

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Need help on a 1995 Chevy Suburban. It will die at idle when it's up to running temp and in gear. I have to pump the gas peddle to keep it from dying. Just did a tune up and throttle body cleaning to see...


it sounds like the motor's tick over is far to slow when the car is put in gear if the tick over is say 750 rpm out of gear then it stalls when you put it in gear lift the tick over up to say 850 rpm the best way to set this up is have a friend sit in the car, warm the motor up, then get your friend to hold the foot brake hard on and put the car in gear, if it stalls bring the tick over up (in gear) till it dont stall,,,but hold the brakes hard on when your doing this,,,getting run over is not a nice thing to hapen to you and it wont make your day? you should feel a dit of a thump when you plop it into gear so hold the foot brake down when you do plop it in gear every time you do so, it saves the transmishion getting a thumping, all the things you have done to your car so far have only done it good, but why not change the oil and filter as well and know you have done the full monty on your car, and it wont need another service for another year or so?????

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1 Answer

Rough idle then stalls


Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

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1 Answer

Engine Dies in Idel


being a certified mechanic has its advantages. there are multiple causes for that problem: lack of air or lack of fuel.
make sure the air filter is mostly clean.
check throttle plate (where air filter tube goes into motor), most likely black with soot and carbon. clean with tooth brush and gas, wipe off with clean rag. repeat ultil CLEAN.
low air flow past plate when closed (idle) will cause stall condition.
dirty throttle body is a common problem with lots of cars. causes engine stall.

dirty fuel filter will also cause this problem.. low fuel pressure at idle.

I also believe that your car is equipped with an idle air control valve. (regulates a bypassed air flow to motor at idle) this valve may be stopped up or non-functional. have local shop take a look, but there are ways to check valve if you consider yourself mechanically inclined

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Idles fine then dies when put in drive or reverse


You may have a problem with idle speed control motor or ETC as GM calles it. here is a photo and a price from rockauto.com.
STANDARD MOTOR PRODUCTS Part # SA4 moreinfo.gif
Motor Assembly sa4_full.jpg $110.99

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If it runs down highway fine, but just stalls when off throttle, turning, heater on, etc., I'd pull I.A.C. motor off and clean with throttle body cleaner & retry it. Clean port it came out of at same time too. if it cures it even temporarily, and does it again, replace IAC motor.

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Engine stalls when put into gear, idle fines in park


This is a comon problem with GM cars.Most likely cause is the torqe converter clutch lock up solenoid.

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check your transmission fluid,the motor will stall when fluid is low

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1 Answer

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duck tape on the air intake. I just fixed mine. There is a crack on the intake that lets too much air in when you put it in drive that makes the car stall. Try it it works.

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