Stalling 80q

[Huw Powell]

> My sister has a '91 80q that has a stalling problem that has a long story.
> Here goes- It all started in January when the car failed the emission test
> here in Denver--high HC and CO. 

That would mean it was running rich, right?

> Otherwise it seemed to be running very well. 

It would...

> The mech said that all testing was leading to bad ECU. 

My first, and last thought (since it wasn't replaced yet!) is the oxygen
sensor.  Is it working?

Measured two ways to be sure - OXS output voltage (when warm, cycles
approx .2-.8 volts) and Control Pressure Regulator, likewise should
cycle every few seconds when warm from a bit above to a bit below 0 mA -
ie, like -3 mA to +3 mA or so.

Surely this has been checked by now, but I figured I would ask...

> dealer (ouch!!!) she's had the following replaced with NEW parts:
> 
> Cap/ rotor
> Fuel pressure regulator (regulator valve)
> ECU (used)
> Airflow meter
> Idle stabilizer
> air sensor--$600--what the #$%@ is this???  P/N 054-133-471B
> Idle/WOT switch

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/