low fuel pressure - Dodge Cummins Diesel Forum
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post #1 of 6 (permalink) Old 02-23-2013, 09:57 PM Thread Starter
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low fuel pressure

i have a 2000 cummins all stock other than the lift pump put a aftermarket stock replacement fass one on the last few days i cant get fuel pressure ill hit the key and i can hear the left pump run for the aloted time ill start the truck pressure will go to 12 then slowly drop to 0 i shut the truck off and bump the key again i dont hear the lift pump running went to the stor and bought power service 911 dumoed it in and reran truck pressure went from 8 to 5 then slowly climbed back to 15 psi drover truck around seems great but when i put a heavy fuel demand on it my pressure drops from 12 to 8 and truck feels like it falls right on its face is this a sign that i should just replace my feed pump?

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post #2 of 6 (permalink) Old 02-23-2013, 10:01 PM
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Have replaced your fuel filter to make sure it is not cloged?

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post #3 of 6 (permalink) Old 02-23-2013, 10:01 PM
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Have you changed the filter on the FASS??

I'd certainly check that first.

2001, QCSB, 4" MBRP, 51" Donaldson, Edge Comp, FASS 3rd gen brakes, 3rd gen steering, Borgeson box & shaft & pump, superpro bushings, Blue Chip VP44 (awesome), Revmax fully built transmission (horrid experience)
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post #4 of 6 (permalink) Old 02-23-2013, 10:02 PM Thread Starter
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yep not even a week old
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post #5 of 6 (permalink) Old 02-23-2013, 10:27 PM
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Air Leak?

Low of fuel?

Regulator problem?

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post #6 of 6 (permalink) Old 02-23-2013, 10:31 PM Thread Starter
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you talkin the inline filter they give you when i bought the pump right. if you are no i have not
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