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bad1
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vacuum diagram 82 911 SC

I've read a number or your postings listed @ pelican parts, and they've
been helpful. I was hoping you could steer me in a similar direction.
I bought an 82 911SC to get my feet wet in the world of porsche. I like go
fast cars, but I'm not much of a gearhead (yet). The 82 looks great on the
outside, new paintjob, wheels and tires, but I knew I would have to spend
some time under the hood.
The engine and transmission feel solid, but the car was hell to start cold.
Not knowing porsche performance, I also didn't realize it was somewhat
sluggish. New injectors, plugs, wires, and fuel filter took care of that
problem.
I (actually we, me and another porsche owner who knows his way around a
porsche) next focused on the CIS system. The car still played hell for about
3-5 minutes during warm-up. It was then we would learn just how badly the
prior owner(s) mistreated the car mechanically. We disassembled, cleaned and
re assembled the air flow sensor unit per Haynes. However, when attempting
to set the mixture properly with a multimeter (digital, w/ duty cycle), it
shows a 90 % duty cycle. When we try to adjust the 3 mm screw, the car
chokes itself out. The car now starts quickly, and doesn't smell fuel rich,
but the duty cycle reading is still way off, and the car runs @ a high idle
(around 1300 rpm)
So much for the background history. Here's the real question. Haynes says
that the problem may be automatic choke (aux. air valve or regulator).
However,we have noticed what appears to be serious vacuum problems, noticing
that at least two hoses were disconnected and hidden (unplugged). One
appears to be traceable to the deceleration valve, but upon closer
inspection, we think the entire vacuum assembly is hooked up wrong. The
Hayes manuel seems incomplete. DO YOU KNOW WHERE I COULD LOOK AT A COMPLETE
VACUUM LINE LAYOUT FOR MY 82? COULD THIS PROBLEM AFFECT THE CIS DUTY CYCLE?
Before I start replacing more parts, I would like to see if the problem is
not simple like vacuum hoses.
HELP. I've read just about all of the related postings.

Old 12-29-1999, 07:11 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Early_S_Man
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The parts manual for your model is available on microfische, I believe, still, for very low cost compared to the paper version, and has extensive layout diagrams for everything in the car. Personally, I would recommend getting the factory service manuals (all 6 volumes) and the Spec. Book (which also may have the hose diagrams) ... if you intend to keep the car. The 'Excellence' magazine is always a good source of tech. info an articles, and Bruce Anderson's 'Performance Handbook' will help explain many of the 911 evolution mysteries, too.

------------------
Warren Hall
1973 911S Targa
Old 12-31-1999, 10:53 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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hkspwrsche's Avatar
 
Join Date: Jan 2004
Location: Richmond,Va
Posts: 916
No good answers here...any vac.diagrams?

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Harold
Old 10-23-2004, 12:19 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
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