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Old 09-13-2009, 11:11 PM   #1
Join Date: Aug 2009
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Surging idle problems

I have a 1997 TJ, and as of late it has starting surging really bad and nearly cutting off at idle. It runs 100% at everything other than idle. but when allowed to idle for a second the rpm's start dropping and jumping back up to 800 or so, going between 200-1100 and about cutting off in the process.

Anyone have any ideas on how to fix this? -Thanks

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Old 09-14-2009, 09:14 PM   #2
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Possibly fuel filter, vacuum leak or even fuel regulator.

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Old 09-15-2009, 06:15 PM   #3
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It could be bad gas. I had the same problem and put in octane booster and it was fine until I used the same station again...
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Old 09-15-2009, 06:17 PM   #4
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Could be lots of stuff including a dirty throttle body, bad TPS, any indicator lights on at all? Any other recent problems?
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Old 09-16-2009, 12:12 AM   #5
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its not throwing any codes. im thinking about taking that little idle air motor thing off and trying to clean it with some throttle body clener, and cleaning the throttle body as well while im in there.
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