2001 Grand Cherokee is idling very poorly

Jim’s question:

” My 2001 Grand Cherokee is idling very poorly. I had the computer scanned, but there were no codes. Otherwise, it runs fine. It just idles bad.”

Answer:

Yes, many times vehicles can have an idling problem but no codes will pop on the computer. This is because a problem has to reach a certain parameter before it sets a code. A small problem will often not set any codes. In your case, the number ONE problem like that is simply a dirty throttle plate. So either clean that plate yourself, or have a mechanic do it. It’s a pretty simple job, just get some spray throttle cleaner and remove the ductwork going between the air cleaner and the intake manifold. At the manifold, in that big hole, is the throttle valve. Keep spraying it until the cleaner runs clear (instead of black.) I see that an awful lot in Jeeps that idle bad but set no codes.


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