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electric fuel pump

General Tech Talk

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electric fuel pump

Post by Screwy »

ok... my holden V8 mechanical fuel pump has crapped out....

im just going to leave i there and bypass the hoses straight to my carbi...

ive connected the electric fuel pumps back up and the pain hose goes into th carbi...

the second hose coming up from the tank i believe is a breather.... i blocked this off when i has the mechanical pump only operating.... but with the electric pump i have been told i need to connect it back up....

this used to be a L28 6 cylender... now holden V8... just curious as to whether i can just leave that hose open to atmosphere or it has to be connected to a breather on the inlet manifold or the carbi???

screwy
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Post by 6.5 rangie »

Its not a fuel return line is it?
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Post by Screwy »

6.5 rangie wrote:Its not a fuel return line is it?
now that u mention it....thats wat i meant. its not a breather... its a fuel return....

where do i have to connect it too? like on a holley setup....
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Post by tweak'e »

most of the holly set uups i've delt with don't have a return line. the fuel pressure is regulated by the pump. if you have a non-regulated pump then fit a pressure regulator and plump the return from that to your return line.
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Post by Screwy »

well i am using the factory fuel pump and it had a factory fuel return so i would say that it needs it......
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Post by tweak'e »

??? has a factory electric fuel pump as well as a mechanical pump ?
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Post by Screwy »

tweak'e wrote:??? has a factory electric fuel pump as well as a mechanical pump ?
the patrol has a factory one.... the new 5 litre has a mechanical so i bipassed the electric one.... now the mech on the V8 has shat itself so i want to connect up the electric one again and want to know where the return should plud into on a holley
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Post by tweak'e »

ahha that helps :)

sorry i don't know what system the patrols use. i would just get a fuel regulator which will connect up to the return line. most speedshops have them. i hope the fuel pump can flow enough fuel.
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Post by jcclures »

My Nissan had a L28 with a return line, when I fitted my 308 into it I made a return line before the carbi, I just soldered into a T piece a small jet to regulate the back flow. My Nissan had two factory pumps and I never had any problems with the 308.
John
1986 Nissan MK Deluxe, 1uzfe quad cam V8, Bull bar, Thomas Winch
Super Oscar Spotlights, Sliders with Body lift, And Long-range Fuel Tanks.
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