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08-19-2009, 12:17 PM
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#1 |
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67cheby
 
Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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ls1 fuel pump problems, suggestions
my friend is running a 1999 model ls1 in his 68 he is still running the factory tank with a inline fuel pump , he cant seem to get it regulated right , any suggestions certain pump to run or could it be the plumbing, anyone else running the factory tank.. i am sure a tank with the built in fuel tank would be the best bet but he has little extra money .. just trying to do it on the cheap. thanks mike
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08-19-2009, 12:18 PM
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#2 |
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Account Suspended
Join Date: Oct 2008
Location: Gulfport, Ms
Posts: 833
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Re: ls1 fuel pump problems, suggestions
What kind of fuel pump is he running?
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08-19-2009, 02:10 PM
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#3 |
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powdercoater
Join Date: Dec 2008
Location: mesa,az
Posts: 203
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Re: ls1 fuel pump problems, suggestions
Did he add a return line ?
should have atleast 45psi at the rail,maybe the inline pump is not for a inj eng ?? scott |
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08-19-2009, 02:18 PM
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#4 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,937
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Re: ls1 fuel pump problems, suggestions
the regulation is done at the fuel rails on that year. I acutally run around 52 psi on my puel pressure at idle. You will need a return line and should check the pressure let us know what you mean that it wont regulate what are his pressures.
Dave
__________________
Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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08-19-2009, 03:27 PM
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#5 |
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67cheby
Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: ls1 fuel pump problems, suggestions
thanks for all of the suggestions so far i will try to find out some more of the specifics ie.. return line and pressures
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08-19-2009, 04:18 PM
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#6 |
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The Older Generation
   
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,593
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Re: ls1 fuel pump problems, suggestions
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I'm not familiar with the ls1 but I bought a book on TPI installations and the guy that wrote it recommends a 78-81 Nissan/Datsun 280ZX external pump. Advance Auto Parts online # is E8312. When I looked it was $107.98. He says you can put a "T" fitting in the intake side of the pump and just run the return line to it. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 08-19-2009 at 04:20 PM. |
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