Hard start & rough idle when cold

[Huw Powell]

He's talking about a different system on a different engine...

Bill Green wrote:
> Thanks I'll check that valve out. How did you check yours? The only way I
> can see would be to pinch off the line to intake boot and see if it makes a
> difference. Is there another way? 
> 
> As for the frequency valve (potentiometer?) I disconnected the wires and it
> did make a difference (for the worse) in how the engine ran and started.
> I'll check Bentley for the way to check that and see if I can do it. 
>  
> Thanks again.
> 
> -----Original Message-----
> From: Kunz, Bob [mailto:bob.kunz at hp.com] 
> Sent: Tuesday, February 09, 2010 5:59 PM
> To: Bill Green; quattro at audifans.com
> Subject: RE: Hard start & rough idle when cold
> 
> Not mentioned yet is the canister purge valve which looks like a vacuum leak
> sometimes. I had similar issues and found mine was stuck open. Also, when I
> was working this issue ('86 5ks KZ motor) I cleaned the metering plate in
> the horn which was causing unmetered air to bypass. Also, did you check out
> the frequency valve for function?
> 
> --bob
> '86 5Ks Avant
> 
> 
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-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/