Question about 1996 Jeep Grand Cherokee

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96jgc wont idle when cold

Will start in the mornings,but wont idle until it is up to temp

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Are there any codes stored in the cpu. I had a g/cherokee that had the same symptons and a o/2 sensor fixed it. don't go changing parts without checking out the car first.

Posted on Mar 11, 2009


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Posted on Jan 02, 2017


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A/c doesn't work, temp gauge doesn't work, speedometer doesn't work until it gets to 30 mph, and rough idle in the mornings. could all this be the result of a bad computer?

Very unlikely that it would be a computer problem, it does not control the A/C, or temp gauge. Sounds like multiple problems. A/C could be just low on Freon, if pressure is low, it will not turn on. Temp gauge and rough idle may be related, if temp sensor is bad, the computer wont know the engine temperature and thus not mix the fuel correctly. But there are many things that can cause rough cold engine idle, like dirty throttle plate, or bad idle air control valve. You did not say what engine you have, so this is just general information.

Mar 27, 2014 | 1999 Ford Ranger SuperCab

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1989 mercedes 560 sel, gas, w126/ Car cold starts every morning and idles for 10 min. then stalls

the idle control motor probly worn-on the throttlbody--also the tps sensor - get intake area inspectd--a haynes manual will xplain complete car-partstore hazit--------starter fluid is used for low compression or weak spark

Dec 25, 2013 | Cars & Trucks

1 Answer

Want idle on cold mornings.

Thinking possibly the air temp. sensor (mounted in the
air cleaner housing) Really need to see scan data to tell for sure
but that costs a fortune at a dealership.air temp sensor is fairly

Jan 16, 2013 | 2002 Ford Explorer

1 Answer

P2285 code 6.0 litre ford deisel long cranking before starting after starts runs great but oil pressure gauge drops at idle

bad bearings on crank or worn oil pump. Pressure will be up when cold, but will drop when engine warms up. Check for knock in lower end. If so, bad crank bearings.

Jan 16, 2013 | 2004 Ford Super Duty F 550

1 Answer

Wont start in very cold mornings, no sounds when the key is turned.. all lights work.. new starter motor.. new battery..the computer reading comes back as ok.. when the morning are not so cols starts first...

first you start with out accelerator .keep it running for a while .until warm up engine . check the out side temp. and keep clean always .
always start wit out accelerator .

Aug 15, 2012 | 2006 Skoda Fabia 1.2

1 Answer

When i start my jeep in the cold mornings it starts up but bogs right down and stalls then i have to accelerate for the second start up for a few minutes to warm it up a little and then it bogs and stays...

Your only problem friend, is the temperature sending unit/sensor. Upon cold start, this sensor wil tell the computer to go into cold start mode putting a bit more fuel in and raising the idle a bit to keep it running when cold without using the throttle. Replace that sensor and your good to go. Makes sense, right?

Dec 07, 2017 | 2000 Jeep Grand Cherokee

2 Answers

2006 GMC 2500HD Duramax, started and let idle about 5 minutes then put in gear to leave. Noticed power-steering and brakes not working properly. Tried to turn wheel, back up press brake pedal, suddenly...

Larger than stock tires combined with the fluid being cold could cause this.Low fluid level due to leaks.Try cold climate fluid from gm if it just happend cold and no level problems are present.

Dec 06, 2010 | 2006 GMC Sierra

2 Answers

Wont idle when cold. Especially on cooler mornings. Eventually it works fine. Sometimes it will clear after a hi rpm rev.

have someone check the engine temperature sensor to see what temperature it is telling the computer,if it is not telling the computer the correct temp,the computer won't give the engine more fuel on cold mornings

Nov 25, 2009 | 2000 Ford Explorer

2 Answers

Rough Idling, start-up early morning, until engine heats-up


May 04, 2009 | 2001 Jaguar S-Type

2 Answers

Stalls and wont idle when cold

many automobiles behave that way on a cold start, so you don't have to worry about it. just continue to rev the engine until it is warm!

Sep 09, 2008 | 1999 Isuzu Trooper

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