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Old 02-22-2012, 08:04 PM
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Originally Posted by FmrStrtracer
If you are running the pump off the original EFI circuit, the computer shuts the pump off after a short run unless it see's a tach signal that tells it the motor is running.
That is true on a ford, but this is a 06 chevy, oil pressure switch maintains the power to the pump after the prime signal from the pcm.
chrysler also uses the tach signal for keeping the ASD and fuel pump relays energized.
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