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Weird high idle condition....

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Old 09-10-2003, 01:58 PM
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Default Weird high idle condition....

Car: 2000 Z28 M6
mods: Direct flo lid, K&N, HPP3, Loudmouth

Problem: I noticed it after an enthusiastic launch from a stop light (not a race, single lane road). After I ran the car at about 80% (not full throttle, but enough for a "fun" factor) and then slowed down, when I got to the next stop light, the car idled at about 1100 rpm. The engine was warm, and the temp outside was 20-25 degrees celcius. I had also just finished a short highway trip (about 5 kms)previous to the stop light launch. Car continued to idle like this when coasting and when at a stop. After car was in the garage for a few hours, I went out again and the high idle continued. This morning, it seemed to be fine again.

I have 8 plugs (NGK iridium TR55s) and wires (Taylor Spiro 8mm) waiting at home for a change at my earliest convenience. Not sure if that will help at all. Is there something else? The car seems to take a while to come off idle once it warms up too. Is something maybe sticking open or not closing? I was thinking maybe PCV valve?

Any suggestions/comments appreciated.

If I'm in the wrong forum, please feel free to move it.
Old 09-10-2003, 02:05 PM
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Default Re: Weird high idle condition....

Check for a vacuum leak man.
Old 09-10-2003, 04:36 PM
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Default Re: Weird high idle condition....

Be sure the throttle body is returning completely to closed.
Old 09-11-2003, 11:42 AM
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Default Re: Weird high idle condition....

It's crazy, the thing is completely normal today. Must have some gremlins inside. I'll keep my "eye" on it though. thanks for the suggestions.




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