Possibly different '89 200qt power issues

[Joshua Van Tol]

That's the correct behavior for the frequency valve.

On Wednesday, December 11, 2002, at 07:56  AM,
Mike_Buckham at ptk.pioneer.co.uk wrote:

>
> Thanks for the suggestion, Joshua, but I have tried temporarily
> disconnecting the frequency valve whilst the intermittent fault is in
> effect. I can hear the frequency valve buzzing before I've
> disconnected it
> and after I've reconnected it. When disconnected, the engine revs drop
> appreciably. Because of this, I don't think that this is the fault.
> I've
> tried disconnecting all sorts of sensors and valves but none seem to
> cause
> the same symptoms when disconnected.
>
> By the way, is the frequency valve supposed to buzz (when the engine is
> idling), or should it be clicking slowly? I'd guess its working at
> roughly
> 15 to 20Hz at the moment and doesn't seem to change as the engine revs
> change.
>
> Cheers, Mike.
>
>
>
>
>                     Joshua Van Tol
>                     <josh at spiny.com>       To:     quattro quattro
> list <quattro at audifans.com>
>                     Sent by:               cc:
>                     quattro-admin at au       Subject:     Re: Possibly
> different '89 200qt power issues
>                     difans.com
>
>
>                     11/12/2002 13:44
>
>
>
>
>
>
> Have a look at the fuel pump relay. It supplies power through a
> seperate circuit to the frequency valve. Having that circuit go open
> (and it can happen) causes the car to run lean, and this will cause
> poor idling, and stumbling throughout the rpm range.
>
>
>