Date: Wed, 28 Nov 2001 09:10:28 GMT
From: "andrew" <>
Subject: Re: 1985 900s Intermittant Start Problem

I _think_ that the fuel pump system is in good shape, having just replaced it and had lots of testing done on it, however I will pass these words of wisdom on to my mechanic, and will try to report when (if) there is a conclusion to all of this.... Again, thanks to all for their advice and thoughts. andrew. "Thomas" <> wrote in message news:hap80uokuech93lml7420rlern0t5de3mrnopsamcom... > I know what the problem is .... > the non return valve in the fuel pump is faulty... or the accumator si > leaking and then it causes all the fuel to drain back into the tank > leaving the line, metering head and injectors empty > I am guessing after you re-start it when its warm .. it starts > instantly for a second or so then you crank it over forever ?? > Bosch actually sell a replacement non-return valve > let me know > > On Tue, 27 Nov 2001 04:50:32 GMT, "andrew" <> > wrote: > > >I purchased a second-hand 1985 Saab at the end of August, and most of its > >issues have been resolved, save one: the dreaded intermittant start problem. > > > >The car will generally start on the first crank in the morning (cold start), > >but will often not re-start if I have driven it long enough to get the temp > >up, and then left it for an hour or so. Additionally, it will often take > >10-15 secs of cranking before the engine finally turns over and roars to > >life. Once running, the car drives smoothly and idles ~ 1000 RPM. > > > >Every now and then white smoke comes out of the exhaust at startup (the > >dealership thought it was a coolant leak into the head gasket, but the head > >gasket checks out fine) > > > >So far the issue has stumped two Saab mechanics: an indy specialist in > >Vancouver (who is scandanavian himself)and the Saab dealership in Calgary. I > >have had to have the car towed on two separate occasions because it simply > >would _not_ start. The problem does not appear to be consistent or related > >to the weather at all. > > > > > >Any suggestions would be appreciated. > > > >I will detail below what has been done (that I know of) to try and remedy > >the problem: > > > >-> new fuel pump (it actually did die) > >-> new fuel filter > >-> new plugs > >-> rotor ok > >-> distributer cap ok > >-> fuel pressure is fine > >-> oil and coolant flush > >-> new temp sensor > >-> harness re-wire (many of the wires were pretty pooched when he opened it > >up) > >-> head gasket is fine > > > >thanks, > > > > > > > >andrew. > >(this has been cross-posted to > > > > > > >

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