Duramax Diesels Forum Truck of the Week
  #1  
Old 10-02-2017, 11:14 AM
frankenstien's Avatar
frankenstien frankenstien is offline
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Posts: 369

Question Fuel system ? bypassing lift pump

I have a Fass 150G adjustable lift pump on my 05 LLY, it also has a nicktane adapter with a cat spin on fuel filter. I have a sensor for my fuel pressure gauge in the filter head along with a bleeder valve. The fuel system is stock besides those things.

My lift pump is leaking out of the weep hole, its under warranty, but i have to send the pump back, so i was thinking of just grabbing a fitting and hooking the in and out lines together so i can remove the pump to send it off.

However i am not sure if i will have any priming problems after i hook it up, as i have no way to prime the system with no lift pump or hand primer. I would rather not down the truck if i don't have to.

so will it pull that air pocket through from disconnecting the line and be ok? or should i just down it?
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2005 ECSB LLY
5'' exhuast
ATP EFI Live Fass 150 big cat filter
Built Trans w/SC1058
Bumpers built by me
Grade C HG's w/studs
Leveled 295/75/16 Toyo's
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Old 10-02-2017, 11:57 AM
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clrussell clrussell is offline
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Stick an air hose in the fuel filler and prime that way if you have to.

You should be able to take a hose and bypass like you mentioned
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Old 10-02-2017, 02:11 PM
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frankenstien frankenstien is offline
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alright, thanks
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2005 ECSB LLY
5'' exhuast
ATP EFI Live Fass 150 big cat filter
Built Trans w/SC1058
Bumpers built by me
Grade C HG's w/studs
Leveled 295/75/16 Toyo's
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