Sorry, it's a 911SC Targa.

----- Original Message -----
From: "Sean(TCSp)" <mulladys@...>
To: <rbgezon@...>
Cc: <historicrally@yahoogroups.com>
Sent: Wednesday, May 04, 2005 6:42 PM
Subject: [Historic Rallying] Re: Porsche Fuel Mixture


> Does the 'T' in "911T" stand for Turbo or Targa? I see it both ways...
>
> Bosch CIS/K-jet FI, right? IIRC, the turbos had this thru '89....'82 or
> '83 for the N/A versions...There's a coupla great books available on
> Amazon...
>
> If so, and if those symptoms happened on the CIS SAABs (my only real
> knowledge comfort zone) -and-
> - I'd confirmed that the engine is still sealed (no headgasket issues,
> cracked blocks, etc)
> - fuel pressure was good
> ....the problem was the fuel pressure diaphragm/airflow sensor plate more
> often than not. It just takes a pinhole in the diaphragm...
>
> If 'tuned' for cold start-up and, while still cold, it stalls over
> 2000rpm, bump that likelyhood up another 25%. Cars that have sat for a
> long time seem to be more likely candidates, too.
>
> Got an O2 sensor signal reader? If off stoich (14.7:1), that's just more
> fuel for the fire (bad pun).
>
> Tho adjustable, the ham-fisted mechanic @ MeMyselfandI has never able to
> fix a malfunctioning airflow sensor plate/fuel pressure diaphragm system
> (3 so far). NOP -->Replace until fixed.
>
>
> Wed, 4 May 2005 11:24:13 -0400, "R. Bruce Gezon" <rbgezon@...>
>
> I have a 1983 Porsche 911T with a fuel mixture problem that my mechanic
> can't resolve. He indicates that the problem seems to be caused by the
> Bosch electrical system. He is now trying to consult with a Bosch
> distributor for the key to the final solution of the mixture problem after
> installing new hot and cold temperature sensors yesterday only to find
> that the problem still remained. What happens is that if he sets the
> mixture correctly for cold start-up the car then stalls when the engine
> gets hot. If he sets it for hot then it won't start. Does anyone have
> some helpful hints?
>
> Bruce Gezon
>
>
> Sean
>
>
>
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