Question about 1996 Jeep Grand Cherokee

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Jeep sarts fine but idles rough like its missing but then goes away then sometimes it dies but it only does it sometimes

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Clean out the IAC valve on the back of the throttle body. Best way to do this is by removing it and cleaning orfice and end of valve with carb cleaner, DO NOT turn valve end while cleaning, and make sure you put it back straight when replacing! If valve is gummed up, this will usually clear this up!

Posted on Jan 12, 2009

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Why does my 89 jeep comanche 4.0 have a high idle upon start and sometimes while driving. t has been only doing so upon sart but now it does it randomly while driving.


Most vehicles have a high idle until the engine gets hot. As for your random problem, might want to check for any vacuum leaks that could cause this problem.

When checking, best to do with cold engine. Start your vehicle and spray short amounts of starting fluid near vacuum hoses, if idle changes, you may have a leak. Keep away from exhaust manifold if at all possible. Also spray near intake hoses and air filter housing.

Nov 19, 2016 | 1989 Jeep Comanche

1 Answer

1999 cherokee starts and runs fine then idles rough and dies


If the start and run fine are on cold starts, I would look for vacuum leaks. The normal start mode for these things is to have a richer condition upon a cold start. When the ECU detects warmth in the engine is drops the extra rich cold start mode then the idle goes rough due to the normal mixture being too lean due to a vacuum leak. Look for cracked, loose or broken vacuum hoses. It could also be due to a EGR valve stuck open.

Jul 05, 2014 | 1999 Jeep Grand Cherokee

1 Answer

I have 2000 jeep cherokee got a miss when idleing


first thing i would check would be the vacume lines, check around the air cleaner and make sure all the lines are on, have u done any 4 wheeling in the mud or snow? if so check around the transmission and make sure those lines are on too, 2nd thing i would check is the spark plug wires, make sure none of them are laying on the exhaust manifold and shorting out this is easy if its dark out and the lights are off, u can see the sparks normally

Apr 12, 2013 | Jeep Cherokee Cars & Trucks

1 Answer

I have 2000 jeep cherokee got a miss when idleing


Do not replace the spring. Your Car is Fuel Injected and the Idle Air Control is designed to help with the Idle. I would recommend CLEANING the IAC,, Running SEA FOAM through the Fuel System and a Tune Up

Apr 12, 2013 | Jeep Cherokee Cars & Trucks

1 Answer

My 1993 jeep grand cherokee laredo idles rough after warm up. it also idels high around 2000 rpm at start up sometimes and needs to be shut off and restarted to calm idle speed. whats is causing the...


usually rough Idle is not noticable at high ildle. Once it is idles normally try Disconnecting one injector at a time. If the idle stays the same than that cylinder is the culprit. Remove that spark. If it is wet than do a compression test. Should read better than 100lbs of compression.If compression is good take a spark plug and hook it into the end of the plug wire.Lay it across the intake,start the car and watch for spark. If you have spark than you probably have a bad injector. A miss will cause the vehicle to idle high. The computer is trying to keep the car from dieing out. Hope this helps. No spark do a tune up.

Dec 05, 2010 | 1993 Jeep Grand Cherokee

1 Answer

1999 jeep wrangler idles rough almost dies out now has a slight miss or hesitation while driving


Please be fast about checking your fuel pump. It is not giving enough fuel pressure.

Cheers.

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May 25, 2009 | 1999 Jeep Wrangler

1 Answer

Slight miss, starts a little hard then runs fine rough idle from time to time


It sounds like its out of time move the distriutor a little bit

May 10, 2009 | Jeep Cherokee Cars & Trucks

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