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-   -   Replace Decel valve on 1982 SC (http://forums.pelicanparts.com/porsche-911-technical-forum/347917-replace-decel-valve-1982-sc.html)

craig2148 05-22-2007 08:00 AM

Replace Decel valve on 1982 SC
 
Does anyone know approximately how much time is involved in replacing a Decel valve on a 1982 SC? Is the engine pulled out of the car for this procedure? I'm trying to estimate what the repair bill will be. Thanks.

DARISC 05-22-2007 08:15 AM

Mine's disasbled , took about 10 seconds (I didn't personally do it so I can't tell you how) - can't stand the slow drop in revs between shifts. Much more fun to shift without it interfering (better enable to get it smogged though, since it's there for emmissions control on decelaration).

I think there's a "plug it with a golf tee" fix - try the search button.

Gunter 05-22-2007 08:56 AM

Craig:
Why does your Decel Valve need replacing?
What are the symptoms?
It's a little hard to reach behind the FD but should be doable.
Some may do a partial drop?

craig2148 05-22-2007 02:12 PM

Revs don't drop. Hunting idle.

Gunter 05-23-2007 06:27 AM

First thing I would check is the Auxillary Air Regulator (AAR)
That's the one with the electr. wiring to it.
Make sure it gets 12V when running.
It's easy: When cold, the "half-moon" is open, after running for about 2 minutes, the heater element inside closes the opening.

If the AAR works, I would move on to the AAV and Decel Valve.
As for hunting: That's a mixture issue.
Of course, unless the AAR, AAV and Decel Valve work properly, you cannot really get it down to 900 RPM to set the mixture or timing.

I hope the shop will know for sure where the failure is and not just replace parts until the problem goes away.

wswilburn 05-23-2007 08:41 PM

I have a decel valve (and the rest of a CIS system) I recently removed from a 82 SC for an EFI upgrade. Send me a PM if you're interested in anything.


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