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FixItMan, Master Technician
Category: Jeep
Satisfied Customers: 17474
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Extremely high idlelike 2000 rpm in park or neutral around

Customer Question

Extremely high idlelike 2000 rpm in park or neutral around*****
JA: What is the model of your '00 Jeep?
Customer: 97 grand Cherokee limited 5.2 all wheel
JA: Besides this, what condition is the car in?
Customer: Fair to good the transmission shifts hard and the only codes I got out of it are that the mixture runs lean
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: Myself throttle body senor replace plugs wires cap battery terminals and battery oil and fuel filter basic overhaul
JA: Anything else you want the mechanic to know before I connect you?
Customer: That's about it
Submitted: 11 months ago.
Category: Jeep
Expert:  FixItMan replied 11 months ago.

Hello, my name is***** sounds like you have a vacuum leak. When you get a vacuum leak on this engine the idle will be high like this and it will read lean because of too much air entering the engine. You will need to check all of the hoses on the engine for leaks. With the engine running listen for any sort of hissing noises. If there are any then that is where it is coming from. If not then it may be the intake manifold gasket that is leaking or an EGR valve that is stuck open. I hope this helps. If you need further assistance please let me know.