Re: 900 SPG turns over but will not start - Saab 900 Bulletin Board - Saabnet.com
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Re: 900 SPG turns over but will not start
Posted by Hans (more from Hans) on Sun, 22 Feb 2009 17:38:47
In Reply to: 900 SPG turns over but will not start, John Vanderhorst, Sun, 22 Feb 2009 17:09:38
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Use a piece of wire to jump between the tops of fuse 27 to 30 with the ignition turned off (this bypasses the pump relay and sends 12V directly to the pump). You'll hear the pump run if it's working, in which case you might have a bad relay.
Redneck check for system pressure: carefully loosen one of the bolts at the fuel rail (use two wrenches so you don't break the rail). If fuel sprays vigorously, then you should have sufficient pressure to run the car.
If the no-start condition arose at very different ambient temps than the last time you ran it, then suspect the cool. temp. sensor (blue plug, below the intake runners, at the head).
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