'90 200 high idle

Huw Powell audi at humanspeakers.com
Thu Sep 29 13:20:26 PDT 2011


Check your idle switch on the throttle body.

On 9/29/2011 3:14 PM, Nick Lawrence wrote:
> I am experiencing random high idle (2000+/- rpm) in my '90 200tqa.
>   It will drop when I unplug the ISV.  I have cleaned it, does the fact it always drop when unplugged rule out sticking?
> What all inputs info to the ISV control.  I guess turning on the air, or does it only work by seeing a drop in speed?
> TIA for suggestions.
> Nick  central Ohio
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