erratic running (rich?)

[Alan Pritchard]

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Thanks Huw, that was kinda my thoughts, just like to have it backed up.... I
have a new idle/wot switch assembly on my desk here... to be fitted
tomorrow, then I will reset the mixture and recheck my timing just to get
everything back to factory, and while I am at the scrapyard at the weekend I
will pull both sensors and keep them handy as I know they are a common
source of problems.
-----Original Message-----
From: Huw Powell [mailto:audi at humanspeakers.com]
Sent: Tuesday, March 04, 2003 8:03 PM
To: Alan Pritchard
Cc: Quattro List (E-mail)
Subject: Re: erratic running (rich?)


> The good old 90q cis III is behaving very oddly, a few weeks ago it
started
> to drive really badly.... Absolutely gutless until around 4k and then it
> would absolutely fly, it stunk of petrol so I did a temp fix of leaning
the
> mixture up a tad, which improved things almost to how it use to be, at the
> time I suspected it to be the o2 sensor, I have always suspected it of
being
> on its way out. But know the car idles low when warm (400 revs) and when
sat
> on the clutch the revs surge upto 1200 and back, driving seems reasonable
> with a few "flat spots"  but when changing gear and reapplying the
throttle
> the car lurches. This could be due to a dodgy idle switch which is on my
to
> do list. Any opinions gratefully received.

first, fix that dodgy idle switch.

then, at least reset the static mixture while warm and measuring the CPA
current.

and I'd take a look at the temp sender on top of the coolant neck.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/