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Date: Mon, 19 Jan 2004 12:08:49 -0000
From: "GG" <dt97gdnonopsamail.com>
Subject: Re: Cold Weather Dependability


Thanks for all the help - time to get the Haynes manual out. I hate working on the car in the winter! Cheers, Gwilym. "Paul Halliday" <pjghnopsamyonder.co.uk> wrote in message news:BC2DEFFE.CA9B%pjghnopsamyonder.co.uk... > in article bu9049$f5fhh$1nopsam52899.news.uni-berlin.de, Grunff at > grunffnopsam.com wrote on 16/01/2004 15:28: > > > GG wrote: > > > >> 8v > > > > This has the Bosch CIS. When the engine is cold, it uses an extra > > injector (the coldstart injector, the one with the blue plug) to > > introduce extra fuel. It knows when it's cold using the NTC temperature > > sensor (under the inlet manifold somewhere IIRC - it's been a while > > since I had an 8v). > > > > If [a] the injector is faulty, [b] the NTC is faulty, or [c] the wiring > > between them has failed, you will have cold start and running problems. > > There are three main components - the cold start injector, the auxiliary air > valve and the thermo time switch. All these have to (a) be working and (b) > be working together. It gives you somewhere to start and the Haynes is > pretty straightforward about how to test the system. The AAV failed on mine > a few months ago giving me some serious headaches when cold starting. The > cold start injector is fine so long as the AAV is working. > > It could well just be a little lean, which is another way of saying > "fuelling issue" :) If you're going to blindly adjust the mixture, do it > *very* gently. The mixture screw is very sensitive. You'll need a 3mm hex > about 6 inches long to make adjustments. Best have a CO meter handy to read > off the exhaust pipe otherwise. > > Good luck with that fine breed of Saab, > > Paul > > 1989 900 Turbo S > http://saab.go.dyndns.org/ > > >

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