CIS Lambda to straight CIS conversion

[sciroccos at earthlink.net (Jim Ruffi)]

I noticed a pretty huge difference in my 81 when the freq valve went from
non-working to working.
Jim

----- Original Message ----- 
From: "Dan Bubb" <jdbubb@verizon.net>
To: "Cris Carpenter" <ccarpen@earthlink.net>; <scirocco-l@scirocco.org>
Sent: Monday, July 11, 2005 12:35 PM
Subject: Re: CIS Lambda to straight CIS conversion


> I'm betting not.
> On cars I've seen where the frequency valve isn't working, if you adjust
it
> to idle the fuel mixture is all wrong for top end (engine won't pull past
> 4500) or vice versa.
> The frequency valve controls the pressure in the lower chambers of the
fuel
> distributor and adjusting that pressure varies the amount of fuel flowing
to
> the injectors.
> In regular CIS the lower chambers run at system pressure (about 70 psi
IIRC)
> and I would imagine the springs in the metering chambers are quite a bit
> stronger to compensate for the much higher pressure.
>
> Did you check the little relay for the frequency valve to make sure it's
OK?
> Also, I have a valve for cheap (off an 84, but I would assume they're the
> same) if you should need it.
> Dan
>
> ----- Original Message ----- 
> From: "Cris Carpenter" <ccarpen@earthlink.net>
> To: <scirocco-l@scirocco.org>
> Sent: Monday, July 11, 2005 12:04 PM
> Subject: CIS Lambda to straight CIS conversion
>
>
> > Question for those with this kind of experience:
> >
> > The frequency valve in my 81 quit. I want to just do away with the
> > feedback system so it works like an old plain CIS system. Can I somehow
> > get rid of the frequency valve without replacing the fuel distributor
with
> > an earlier non-Lambda one?
> >
> > Thanks,
> > Cris
> >
> >
> >
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>
>
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