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Key on, engine not running...41-47psi Engine idling...W/vac. hose attached 31-44psi. Enging idling..W/O vac. hose attached 42-50psi. These fuel pumps will stop working when they get hot and start working when they cool off. Just let it idle a little while while watching the pressure guage to see if pressure drops out when the stalling problem occures. Crankshaft position sensors CAN act the same way when they go out.

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16y ago

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