Need lift pump upgrade!
Need lift pump upgrade!
i took my friends for a ride a few mins ago and we did a pull from about 35 to around 80 then when i let out of it it died. so pretty much it ran out of fuel. once i cranked it WOT to prime the pump it fired right back up and ran fine so before I burn up my VE i need to get a better lift pump. so my question is what to get and how much will it cost? i want to get it done soon so i can go play
funny
With stock injectors and turned pump a low pressure pump has maintained 10psi no problem, even with slightly larger injectors i'm sure it'll still keep up. Plus it'll last a long time and if you're alternator goes bad you could keep driving until you run out of fuel. Do that with a raptor/fass and no alternator.

With stock injectors and turned pump a low pressure pump has maintained 10psi no problem, even with slightly larger injectors i'm sure it'll still keep up. Plus it'll last a long time and if you're alternator goes bad you could keep driving until you run out of fuel. Do that with a raptor/fass and no alternator.
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Joined: Jan 2008
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From: Quinton, New Jersey (middle of nowhere)

80% of the time.
they run like 4-6 psi stock i believe, if its a good one

gotta get rid of the stockers after some fuel is added.
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A stock 2nd gen piston pump, without a regulator will push the front seal out of the VE. With a regulator, you can safely run it.
You need the low pressure one found on agricultural equipment, and I believe you can order it from John Deere.
You need the low pressure one found on agricultural equipment, and I believe you can order it from John Deere.
What i would like to know is did a second gen 12v come stock with a piston pump or did they have a similar lift pump as the 1st gen, Just out of curiosity.
Last edited by sixb; Jun 16, 2009 at 08:31 PM. Reason: Wrote second when I wanted first
i know the second gen needs a low pressure piston pump old part# 3936320 new # 4988751 @ $186.61 and 2 gaskets old # 3931348 new # 3939258 @ 2.10 each and last a spacer # 3914284 @ 12.86
What i would like to know is did a second gen 12v come stock with a piston pump or did they have a similar lift pump as the 1st gen, Just out of curiosity.
What i would like to know is did a second gen 12v come stock with a piston pump or did they have a similar lift pump as the 1st gen, Just out of curiosity.

Like apwatson said, the 2nd gens came stock with a piston pump, unlike a 1st gen diaphram lift pump.

On my conversion I am using a 92 ctd with a 94 fuel filter head and will run the piston pump. I wonder if I could take the fuel line from any 2nd gen 12v from the piston pump to the fuel filter head. I still need to make one up to go from the filter to the I/C and it may be easier to just make both.




Those are nice systems but overly complicated for your needs.