Warm engine idle fluctuation

[Huw Powell]

The 88 90Q is not motronic, it's CIS-E3

> check the temp gauge at the back of the block.  this sets the motronic
> temperature input.  a failure of this device will lead to the symptoms you
> describe.
>
> --
> My 1988 90Q idle is about 1200 RPM when fully warmed up. It then starts to
> fluctuate between 1220 and 750 every two seconds.

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/