90audi"80"

[Huw Powell]

> Adjusted fuel mixture with 3mm wrench, and the car runs good for a short 
> diatance, then it runs rich to the point that it's necessary to readjust 
> for a leaner mixture. 

Something is wrong ;)

And what it is is that somewhere along the way your ECU is not adjusting 
for engine temperature (which allows rich running when cold, leans out 
as it warms, then goes into closed loop and listens to the OXS when 
fully warm).

> Problem started after I put another fuel pump on.

Probably not related.

> Have changed numerous parts, but to no 
> avail...

I am curious what is now new.

Main culprits here, besides connectors and grounds, are the ECU NTC temp 
sender on the radiator hose flange (should be in the kilohm range when 
cold, drops to a few hundred ohms whan warm, as I recall), or possibly 
the ECU itself.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/