Audi: 1985 4000S running rich and sputters when cold

I've got the same problem with my '89 200TQ. Looking forward to seeing what
folks say.
 

Might be an adjustment to the fuel distributor, maybe CO.
Might be set very rich and then when the loop closes the 02 sensor compensates
some for the overly rich condition.
I don't see it sputtering though. (scratching head)
Check the CO or FPR current when the engine is cold

Are you using platinum spark plugs in it? Try some Bosch tri-electrodes
(W7DTCs) and see what that does for it.
Could also be a weak coil.
All new ignition pieces?
New Spark Plug Wires? Might be defective but working better when they warm up.

just some thoughts!
later,
dave
Reminder........
Before you criticize someone, you should walk a mile in their shoes. That way,
when you criticize them, you are a mile away from them, and you have their
shoes. Frieda Norris

On 13 Jan 2004 13:47:22 GMT, comANTISPAM (dave) wrote:
 

Thanks, will check on those things as well.

have to admit, that I temporarely removed the Oxygen sensor from the
muffler tube and are using an old catalytic converter from my 84 junk
car.

Reason for that is to avoid damaging the new converter before fxing
potential fuel/ignition problems.

Perhaps I should just go ahead putting in a new converter (bonsal
perhaps) and re-install the oxygen sensor which is new.

This is a California car.