Author Topic: fuel pressure question  (Read 2469 times)

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phi564

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fuel pressure question
« on: Jul 17, 2007, 08:10:58 AM »
while doing my SAS this weekend i had to pull the fuel tank to weld the spring hanger in the back, then i discovered this nice unforseen problem.


i was think'n for now i'm gonna put some rubber fuel line in there, and replace the whole think in a little bit with a fuel cell in the bed, but i don't know if the rubber line would hold the pressure.

does anyone know if this will work or do i just need to bite the bullet and buy a sender unit for now ($117, OUCH).

thanks for any help,
chris
01 Dodge 2500 Cummins dd/ tow rig
'90 toyota w/ 4.3 on propane/th350/toy duels
fj80 axles, 39" BFG krawlers, psc full hydro, 4.10's, detroit front, welderd rear



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auckman

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Re: fuel pressure question
« Reply #1 on: Jul 17, 2007, 09:10:53 AM »
you have to buy the high pressure fuel line, but that would work..  i think those run like 50-80 lbs pressure (for the rubber line)
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83LotsOfun

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Re: fuel pressure question
« Reply #2 on: Jul 17, 2007, 10:21:11 AM »
Just get the rubber line for a EFI system it should hold.  It will have nylon braiding through the rubber. I run it and have no fuel line issues.
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BigMike

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Re: fuel pressure question
« Reply #3 on: Jul 17, 2007, 11:14:20 AM »
Go to a wrecking yard and just get another used one? It can't be too much for the whole assembly, fuel pump and sender included. I've bought an entire gas tank complete (including fuel pump and sender) for $75-

Just for reference, fuel pressure under closed throttle should be about 30-35 psi and under full throttle (or zero vacuum) it should be between 35-45 psi.

My 3RZ came out of a T100, and the book called for a T100:
31-37 psi at idle
38-44 psi at WOT

I am using a single turbo Supra (7M-GTE) fuel pump, and the book calls for it:
23-30 psi at idle
33-40 psi at WOT

And my actual reading with my 3RZ and Supra Turbo fuel pump is:
39 psi at idle
46 psi at WOT
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phi564 [OP]

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Re: fuel pressure question
« Reply #4 on: Jul 17, 2007, 11:17:37 AM »
thanks guy, i've got some guys looking for used one right now.

chris
01 Dodge 2500 Cummins dd/ tow rig
'90 toyota w/ 4.3 on propane/th350/toy duels
fj80 axles, 39" BFG krawlers, psc full hydro, 4.10's, detroit front, welderd rear



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