Fuel Pump problems after head gasket replacement - Saab 9000 Bulletin Board - Saabnet.com
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Fuel Pump problems after head gasket replacement
Posted by Mike P in MI (more from Mike P in MI) on Sun, 10 Jul 2011 12:47:53
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I replaced my head gasket on my 87 9000. Now the car cranks but will not start.
The fuel pump runs when I jumper fuse 23 and 14. But not during normal operation.
The fuel pump relay has battery voltage on pin 30 and gets battery voltage on pin 86 when I turn the key, but no voltage on pins 87 or 87b.
I swapped out the relay with other known good ones, but no change.
I put an LED tester accross pins 85 and 86 of the fuel pump relay socket, and it did not light up when I turned the key. Pin 85 goes to the ECU through purple wire to pin 17 of the ECU. I think that the ECU is supposed to pull pin 17 low when the fuel pump is supposed to run, but it is not working properly.
Any thoughts??? I am stuck.
Regards,
Mike P in MI
posted by 68.41.29...
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