Fuel Rail Questions
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Teching In
Joined: Sep 2021
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From: Georgia
Fuel Rail Questions I’m working on installing a 5.3L (LM7) into my ‘06 Jeep TJ. The fuel rail on the 5.3 has a line and return but my Jeep only has one main line from the fuel tank. What are my options here? Is it possible to just get an aftermarket fuel rail that is returnless? Or, do I keep the return fuel rail and modify the fuel pump/sending unit somehow? Thanks.
TECH Fanatic
Joined: Jan 2022
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I’m working on installing a 5.3L (LM7) into my ‘06 Jeep TJ. The fuel rail on the 5.3 has a line and return but my Jeep only has one main line from the fuel tank. What are my options here? Is it possible to just get an aftermarket fuel rail that is returnless? Or, do I keep the return fuel rail and modify the fuel pump/sending unit somehow? Thanks.
https://walbrofuelpumps.com/255lph-w...pump.html.html
I think you have two ways to go, first is to run a 5/16" return line to the tank. This will retain the regulator that's up on the intake manifold. Second is to use a Corvette style filter/regulator back near the gas tank and change the fuel rails out to returnless.
TECH Fanatic
Joined: Sep 2008
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I used a Walbro 255 in tank pump and C5 FFR on my 98 Wrangler LS6 swap. It has run like a champ for over 13 years. Back when I did my swap there wasn't fuel pump kit so I had to mod the stock wrangler. Today I would go with something like Holley or maybe Novak. Single -6 SS line from gas tank to fuel rail. You shouldn't need any more than a 255 for your 5.3.
Oh and its a great swap. Good luck.
Oh and its a great swap. Good luck.
