Question about 1994 Jeep Grand Cherokee

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94 grand cherokee idles fast,changed iac,tpsvss&trottle body

No codes showing,sitting still when first started it idles normal when driving it idles up to 2k

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  • Jeep Master
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Check and test vacuum hoses.

Posted on Dec 06, 2012

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Posted on Jan 02, 2017

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SOURCE: idles low and stalls when i push and release

check throttle position sensor

Posted on Sep 17, 2009

  • 94 Answers

SOURCE: 2004 Jeep Grand Cherokee. Keeps stalling, engine

P0505 means the whole Idle Control system, not only the IAM. Check all related sensors (i.e. crankshaft sensor). Check with a voltmeter direct at the connector of the IAM if you get any signal. Remove the IAM from the TB, connect him, let someone switch your ignition key to ON. The IAM need to drive in/out for a short time to find the right position. Hold the IAM near a hard part, that they cant drive out completely! If IAM works fine, check the fuel pressure, check and clean your TB ( if not done yet). If that doesn't work, come back again please

Posted on Oct 27, 2009

riceski
  • 1851 Answers

SOURCE: my jeep grand cherokee started overheating at idle

try the water pump - first - make sure the radiator is really full - take the cap off cold and fill - if it looks full - start and run 8 minutes or so - then fill it up - look at ur fan belt - is it tight - tight is about how much pressure u use to make a firm hand shake with little movement - any movement over about an inch is loose - when the jeep warms up the belt can slip and not even make a noise - - new materials don't always squeal. - then be sure ur water pump is ok - they go slowing - the fins wear down - one more thing is the radiator - u don't say how many miles or what maintenance schedules you have or not so that's it for now

Posted on Dec 26, 2009

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1 Answer

Won't idle


I would check the IAC stepper motor plunjer (idle air control). Dirt can build up on the plunjer and the air canal and will disturbe the idle control. The IAC sits on the throttle body.

Jun 28, 2014 | 2000 Jeep Grand Cherokee

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Idle adjustment


idle is not adjustable
pcm decide the idle rpm by iac valve
try to clean trottle body plate and iac hole with combustion chamber cleaner and pour the rest at the trottle body engine idle enough not to stall engine

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thats a lean code have fuel pressure tested

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My 85 Pontiac 6000 4cyl stops while driving. I have new battery, spark plugs, distributor and coil. These did not fix it. The car will start and will drive, then stops while driving and will not start,...


Clean trottle body and trottle plate and IAC valve (idle air valve)
Could be coolant sensor defect or thermostat
and fuel injector or fuel filter
Hope it help

Apr 16, 2012 | 1985 Pontiac 6000

1 Answer

While driving truck wants to stall but continues to run, also service engine light comes on.


see if you can pull the codes for vehicle ,,but it sounds like a idle air control valve,iac,,,or sometimes trottle position sensor,,,most the time you can take iac off clean part and trottle body

Aug 30, 2010 | 1994 GMC Sierra

1 Answer

Idle seems to drop to around 250 and sometimes stalls.


it sounds like a idle control valve if you keep your foot on the gas alittle does it stay runningif so does it sound normal if so it probably your idle control valve and to should be on the back of your trottle body also try cleanind the inside of your trottle body with a lint free rag and some trottle body cleaner make sure you open the butterfly and get all that carben out of there sometimes the carben build up will also cause a big drop in rpm.

Nov 09, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Trottle body gets black have changed Oil etc he


How do the breather valves look on top of the valve cover?

Oct 28, 2009 | 1994 Jeep Grand Cherokee

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Rough idle stalls at low rpm's


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

Dec 06, 2008 | 1996 Jeep Grand Cherokee

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