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Dean Stearns Posted on Aug 01, 2016
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My 1997 Jeep Grand Cherokee Laredo front wheel drive my car is got a rough idle keeps backfiring and will not get up to speed it keeps jerking

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Bill Boyd

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  • Jeep Master 53,816 Answers
  • Posted on Aug 01, 2016
Bill Boyd
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Joined: Jan 04, 2013
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Run the fault codes and check for problem cam/crank position sensors or sensor wires and connections

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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.
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I have a '97 Jeep Grand Cherokee Laredo 4.0 liter that won't idle

Check your throtle postition sensor. It monitors what postion the throtle is at and sends that info to the ecm. It will go bad and cause that problem.
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My 1997 Jeep Grand Cherokee Laredo is making a clunking noise near the front left wheel. The clunking is fast or slow in relation to the speed.

You may have a bad c/v or universal joint at the end of that front axle. If it's a c/v joint, the boot will be torn. If you have a universal joint, it will appear rusted (powdered rust showing around the dust seals) or will be loose when the wheel is off the ground and "unloaded". If they check out as good, you could have a bad hub bearing or a brake problem...you will need to take it apart and give it a good look over.
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Front end jumps when I make slow turns in my 1996 Jeep Grand Cherokee Laredo.

Hi, check your tyre sizes, transmission windup can occur if wrong size tyres are fitted or one set are worn more than the other axle,
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Rpm for a 1990 cherokee laredo

Should idle at 750-875. I would not exceed 950 and would not go below 700.
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Full time 4wd doesn't feel right on my 1995 grand cherokee laredo

normaly you wouldn't drive all the time in 4 wheel drive in less it is mad that way but the reason it jearks when turning sharp is because the front axle is tring to grip but the tire just bends and slips commen problem
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