Join Date: Feb 2000
Location: Hillsdale, MI
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Re: TJ What would cause idle flare-up between shifts??
Sounds similar to the problem I just had with my 2.5L. One of the intake/exhaust bolts had fallen out, and the others were loose. This created a vacuum leak. Put the bolts back in and the problem went away. You might want to clean your Idle air control while you're in there also. I also discovered that there is a secondary throttle return spring. This spring was broken and half of it was missing on mine.