Question about 1998 Jeep Grand Cherokee

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98 Jeep Grand Cherokee - Won't run without holding gas pedal down

It will start and run fine as long as I am holding the gas pedal down. As soon as I let up on the pedal the engine dies.

Another issue I noticed is with the engine turned off, the heater/ac fan continues to run.

Not sure if the two issues are somehow related but both began at the same time.

Any help would be appreciated.

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Same problem I overheated my jeep and ruined the Idle control sensor. put a new one in and it fixed the problem

Posted on Jan 04, 2009

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You might want to check the Throttle Position Sensor (TPS) It''s been a while since I did one (on a pontiac) I am having heater problems with my 98 GC as well. I have found that it gets power all the time and the switch just cuts the ground to either comple or uncomplete the circuit. It could be a number of problems I would check for bad ground or a bad switch

Posted on Dec 31, 2008

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My 98 grand cherokee did this when I went to purchase it! The problem was my jeep has a remote start on it and somehow it caused it to do this. We had to push the remote in some sort of code style to fix it. The dealer said it is some kind of security feature. I hope this helps.

Posted on Dec 23, 2008

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First thing to check is vacuum hoses. a split or disconnected hose can give you a stalling problem as you outlined.
I think you are talking about the blower motor? (under the dash) Not the fans at the front of the engine right? I don't remember if there is a relay for blower motor if there is, contacts may be burned closed. Is blower on with key in "off" position? (some designs leave blower on at all times, running very low speed.) I really don't see any connection between both problems but I could be wrong.

Posted on Dec 16, 2008

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