1988 SPG, no start question - Saab 900 Bulletin Board - Saabnet.com
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1988 SPG, no start question
Posted by Ed N [Email] (more from Ed N) on Fri, 9 Apr 2010 09:50:02
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Hi Folks
I have a 1988 SPG. Its almost always starts immediately with no problems and runs just fine. But sometimes it just won't start. Engine cranks fine. I've hot wired the fuel pump, which works fine, and tried starting, no joy. This eliminates fuel pump relay.
I've put a timing light on the spark plug wires and crank. I get an indication of a good spark, so the "fire" is there.
I suspect the fuel injectors are not getting the order to open up. This indicates that the electronic control unit is the problem, or a connection between the distributor and the ECU is faulty.
Question: Does getting spark rule out the Hall sensor (in the distributor for this model year)? If so, looks like its in between the distributor and the ECU, possibly the ECU itself. Its strange to be intermittent.
thanks
posted by 76.111.20...
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