puzzled about fuel lines
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Teching In
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puzzled about fuel lines I am doing a ls swap on my 87 Chevrolet truck out of a 2000 5.7 Z28 . The conversion books and everywhere I've read on the Web says to use the Corvette filter and regulator ,it has one line going to the fuel rail and one line from the pump and a return one the back side . My question is why are there 2 lines coming out of my return? Is one the Evap line? If it is the evap line can I just run it into the charcoal canister on my truck ? Please help with this, I am confused and am anxious to hear my truck run with a modern power plant!
Thread Starter
Teching In
Joined: Nov 2014
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Thanks Chevy owner for your help ,I understand how the regulator works ,I just don't know what both fuel lines coming off the fuel rail are. I know one is the supply line but is the other for the evap line? If so can I just run it to my evap canister?
Are you sure that both lines are coming off the fuel rail? One 3/8 and one 5/16 about an inch or so apart? If that's the case you may have a '97-98 Corvette fuel rail, in which case one is a feed and one is a return. Can you post a pic?
Last edited by ls1nova71; Nov 12, 2014 at 10:08 AM.
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From: The Burnie, MD
If you're running a Vette filter/regulator in the rear, you only need one fuel rail connection. It wouldn't be an evap connection, that would come off the intake somewhere (I believe). If you have 2 fuel rail connections you could either block one off or replace it.
If your truck had an evap system before, you can run your existing evap line from your tank straight to a charcoal canister for venting purposes. That way you could just delete any evap components from the ECU.
If your truck had an evap system before, you can run your existing evap line from your tank straight to a charcoal canister for venting purposes. That way you could just delete any evap components from the ECU.
