audi 80 what is this idle problem!!!

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10-26-2001, 06:33 PM

Audios69

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audi 80 what is this idle problem!!!

4cyl audi 80, 88 My idle is fluctuating at start up rapidly from 1200rpm-1350rpm. I know I don't have any vac leaks.
Idle stabilizer??? But I tried a different one that did the same thing... Can anyone give me any suggestions???

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10-26-2001, 06:46 PM

Ben's e//S2

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99.9% sure its your o2 sensor.

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10-27-2001, 03:48 AM

Spanglear

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ISV?

Where did you get the other ISV that you said you tried? Could have been bad also. Might be the wiring to it has a bad connection or something.

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10-28-2001, 11:06 AM

Audios69

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not isv not o2 sensor

I tried another isv and have a new O2 sensor on it.

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10-30-2001, 06:52 AM

JustinOOOO

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Not your 02 sensor trust me I've got the same car

Three things to check, but since you say no vaccum leak just two. 1-ingnition timing and valve timing. By valve timing i mean make sure the belt is lined up perfectly with the dimples and grooves on your 3 pullies (sometimes they stretch). also check the tensioner, make sure the belt has no slack, and the belt doesnt flop around