1983 Audi Coupe GT - Engine stalls on quick acceleration

[Huw Powell]

audicpgt at aol.com wrote:
>   Hello Huw,
> 
> I have a CIS... Not electronic "E".  I don't think that came along until 
> late 1985.

MY 84

> I'll check the WOT, but I believe it does not require WOT to induce the 
> stalling.

The switch comes one at about 2/3 throttle, though we call the WOT 
switch.  It stops closed loop and enriches the mixture.

> I will recheck, but I seem to remember that removing the oil cap on the 
> V/C caused the engine to die.  I never really understood why, but 
> figured it was normal.  If it is not normal, any ideas?

On some cars, there is so much air flow from the head to the intake that 
opening up the cap leans things out and stops engine.  Should not be the 
case on yours, since there is a very restrictive bit of plastic in the path.

> Someone mentioned the O2 sensor, but I can't see it creating such havoc.

Me neither.

> Someone also said something about the buzzing thing on the fender by the 
> fuel distributor.  I never understood what it was, but it does buzz.

That's the "frequency valve".  It is a PCM device that regulates your 
fuel flow in response to the OXS and ECU.  It can be tested/adjusted 
with a meter that measures duty cycle.

> I've considered the warm-up regulator, I know it alters the fuel 
> pressure to the circuit at the top of the fuel dist depending on engine 
> temp.  But since I don't have a cold start or cold idle problem, I can't 
> see how it could be the culprit.  I hope it isn't the warm-up reg since 
> they are quite expensive (unless I could find a trusted used one).

They do go bad, but I can't see (being blind) how the WUR could create 
the problem you have.  Unless maybe you replaced vacuum lines and put 
the check valve in backwards?

> Thank you for your input and your time Huw.  I've been a fan of your 
> website for along time... it has helped me greatly in the past.

Glad to be of any help.  Copied the list.

> 

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/