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Jeep Grand Cherokee engine problem - READ ONLY

2 messages,  Last post on May 15, 2009 at 10:13 AM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum. Your Hosts are steve_ & tidester

What is this discussion about? Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, SUV


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#1 of 2
Jeep Grand Cherokee engine problem by indianajames
May 15, 2009 (6:10 am)
I have a 1994 Jeep Grand Cherokee and it has a problem with either fuel or electrics.
 
When I start it in the morning the idle fluctuates. When I try to rev the engine the idle drops off completely and sometimes the engine stops. After a few minutes I can gently rev the engine but if I put my foot down too hard and fast then there is a 'popping' from the inlet manifold. If the revs are high then the popping stops and it revs normally until I let it settle to idle. Then when I try and rev it hard again the same thing happens.
 
Once the engine is warm it drives ok but accelerate too hard and it will backfire or 'pop' again.
 
In very hot weather the performance drops off completely and on steep hills or under load the engine will eventually stop. I have to wait until the engine is virtually cold in order for me to re-start. If I remove the MAP sensor, it helps but only for a while.
 
I have changed the coil. I do not know whether this is an electrical fault in one of the sensors, a fuel pressure problem, an ECU problem or a vacuum leak. Please help.
#2 of 2
Re: Jeep Grand Cherokee engine problem [indianajames] by tidester HOST
May 15, 2009 (10:13 am)

Replying to: indianajames (May 15, 2009 6:10 am)

Please post your message in the existing Jeep Cherokee Grand Cherokee Engine and Performance Issues discussion. Thanks.
 
tidester, host
SUVs and Smart Shopper

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