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Old 10-16-2007, 01:50 AM   #1
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I believe that my fuel pump may be starting to fail. It is in the beginning stages of the dreaded GM fuel pump whine. I know someone out knows the factory PSI for the system. Car is an '01 SSEi. Appreciate any help.
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Old 10-16-2007, 08:27 AM   #2
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48-52 with the car not running, all air purged out of the gauge line. This is the max pressure reading after you've clicked the key on and off a number of times.

My suggestion would be to do this after you have been running the car and it'* up to temp. While it'* a bit of a hazard for the heat and gas...it'* about the best time from a pump perspective.
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Old 10-16-2007, 02:15 PM   #3
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Another method is to disconnect the vacuum line and it should be about 54-58 psi with the engine running.
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