Re: Coupe Quattro 20V ISV question

[jgraham1@erols.com]

Peter Schulz wrote:

> Folks:
>
> My 1990 Coupe Quattro is going through a habit of stalling and
> irregular idling.  While driving, and then for instance, taking
> the car out of gear to stop, the rpms will drop to 500 or below,
> causing the motor to buck, sometimes stall, sometimes return to 900.
>
> I replaced the ISV two years ago, and I recently replaced the old
> rubber crankcase breather with the upgraded metal replacement.
> Cap, rotor, plugs, plug wires were replaced last year.
>
> I always run the CQ on Texaco 93 octane. As a test, I disconnected
> the ISV lead, and the engine promptly died.  The engine would not
> start with the ISV lead disconnected.
>
> I removed the ISV, and cleaned it with carburetor cleaner, and then
> thoroughly with brake cleaner with that ran out. After the ISV dried,
> I reconnected it, along with the lead.
>
> The engine idled better for a while, then returned to its old habits.
>
> This problem seems to be accentuated by hot, humid weather.
>
> Any ideas?
>
> Thanks!
>
> Peter Schulz
> 1990 Coupe Quattro
> schulz@ed.ray.com

 What type of spark plugs are you useing? I find that my CQ 20V will not
run right with
anything other than the factory plugs F6DTC.

John.
1990 QC