LS fuel system question need help

[trkfrk]

My LS1 is out of a 1999 Trans Am and has a return fuel system. I plan on using the corvette filter with built in PSI regulator to return back to the tank from the filter. My question is, what do I need to change on my fuel rail to get rid of the return line? Or do I need different fuel rails? If you have any part numbers that will be very helpful.

[trkfrk]

Here is a pic of the filter

[ls1nova71]

Only '97 and '98 Corvettes have return style fuel rails. What you have is a returnless. You dont need to do anything to it. The second lne is an evap line, you won't need it.

[faribran]

Good call Eric. This is the same set up I have.

[trkfrk]

Originally Posted by ls1nova71

Only '97 and '98 Corvettes have return style fuel rails. What you have is a returnless. You dont need to do anything to it. The second lne is an evap line, you won't need it.

That's great news. What do you recommend I do with the evap line? Thanks for your help.

[trkfrk]

It looks like I can cap the fitting coming out of the manifold for the evap hose. Has any one done this?

Thanks

[trkfrk]

I removed the evap hose from the fitting in the intake manifold. It looks like the fitting is pressed into the manifold.

[ls1nova71]

Yes, just put a vacuum cap on that and you're done.

[trkfrk]

Originally Posted by ls1nova71

Yes, just put a vacuum cap on that and you're done.

Perfect. Thanks for reply.

My last question and then I can start ordering my fittings and filter to get the fuel system routed. There are 3 connections on my fuel pump. The connection on the far left is marked "R", I assume return. The far right connection is marked "F", I'm ussuming filter or supply/psi line. What is the middle connection for? Is it the evap connection? Can it be plugged or should it be vented? Or am I completely wrong?

[ls1nova71]

Originally Posted by trkfrk

Perfect. Thanks for reply.

My last question and then I can start ordering my fittings and filter to get the fuel system routed. There are 3 connections on my fuel pump. The connection on the far left is marked "R", I assume return. The far right connection is marked "F", I'm ussuming filter or supply/psi line. What is the middle connection for? Is it the evap connection? Can it be plugged or should it be vented? Or am I completely wrong?

You are correct on the feed and return lines. The tank DOES need to be vented somehow, so the center one can be run to a vent if your tank doesn't already have one. I'm assuming that is a Camaro fuel pump/sender assembly? If so, they are internally regulated and don't need the Vette regulator.

Edit: The more I look at it, that looks more like a truck pump/sender assembly. In which case you DO need the Vette filter/regulator.