Date: Thu, 22 Oct 1998 19:51:55 -0700
From: Justin VanAbrahams <jvanabranopsamnet>
Subject: Re: cutout

Andy Clay wrote: > > Alistair Macpherson wrote: > > > > Help!! > > > > I own an 87 Saab 900 turbo which has been superb fun; > > unfortunately, there always is one, it is cutting out and the garage can > > find nothing wrong.~**!nopsam! > > > > The rev meter fluctuates wildly before usually sitting at zero, then at any > > time the engine just cuts out. I can usually restart the car first time but > > without really gunning the engine it will always cut out again. This happens > > when the engine is both cold and hot. ( There is also a battery drain which > > means the battery dies after about five days if not used - connection?) > > > > Any sensible help will be gratefully received > > > > Thank you > > I had a similar problem with my '82 900. It turned out to be the wiring > loom around the engine that was causing the problem. There are some > wires in a PVC tube from the alternator round the front of the engine, > and down to the starter motor. The insulation on the wires inside the > PVC was crumbling & the bare wires were shorting out, causing bad power > problems & flat battery. The solution was I made a new wiring harness > to replace it, and have not had any problems since. > > Cheers... Andy The wiring harness is a definite thing to look at - it will cause these symptoms. Other things to check are the hall sensor connector at the distributor - they ALWAYS break and the result is an electrical short against the metal alternator housing. Additionally, check the air mass meter and the O2 sensor. These are really the only things that could cause the symptoms, except a failing ECU, but this is pretty darned unlikely. -Justin

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