[s-cars] Re: 1993 S4 - need some help

[William Noland]

Sounds like the thermostat, as others have mentioned. The temp gauge 
should be be at the first bold hashmark, once she's warmed up. If you're 
not seeing this, it's the thermostat.

Bill Noland

>Long time reader.... not often poster, usually stick to AW. But I'm
>having a long standing problem that no one seems to be able to help me
>with... so I'm turning this one to the experts.
>
>1993 UrS4 - Pastore chip, samco hoses, constant torque clamps - yada
>yada other mods that don't really work into this equation. There is no
>boost leak.
>
>Car keeps running rich, I can see it on my A/F gauge and in my fuel
>milage, also the black nasties that come out the pipe when I get on
>it.
>
>This was diagnosed for months by me to no solution, and finally my
>mechanic tried cleaning some sensors, and magically it went away...
>for about 2 weeks. Now it's back. Do I need to clean these sensors
>better? Was it just luck and the weather or something is why I thought
>it was fixed for 2 weeks? If the sensor needs constant "cleaning" is
>that an indicator that it is bad and should just be replaced?
>
>Any input on why it's running rich would be greatly appreciated. 
>  
>