Help with Fuel line set up
Thread Starter
Racer
Joined: May 2014
Posts: 282
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From: Albany GA
Help with Fuel line set up
Ok. I am slowly working thru this fuel pressure issue as life has been busy. I am thinking for starters that the lines are way to complicated in my current setup. Links for pics are below. Can I simplify this set up? Fuel line comes in to the fuel rail say front drivers side connect a line to connect the back of rails and the return line hook up to the front passenger side? Could all these lines and Y's be causing fuel pressure loss. Or is this set up good? All comments are appreciated!
https://www.dropbox.com/s/vblow8ffvr...51.31.jpg?dl=0
https://www.dropbox.com/s/7e95ooqjs5...18.01.jpg?dl=0
https://www.dropbox.com/s/vblow8ffvr...51.31.jpg?dl=0
https://www.dropbox.com/s/7e95ooqjs5...18.01.jpg?dl=0
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it definitely is kind of a mess and could be cleaned up... what kind of pump are you running?... in tank or secondary?... are the lines from the tank stock or has it been tapped with a bulkhead, etc?... I'm wondering why whoever put that system together didn't hook up the vacuum line to the regulator and boost reference it... that way your pressure will rise under boost instead of drop... where are the lines on the passenger side going?... the pic doesn't clearly show where they are hooked up
Thread Starter
Racer
Joined: May 2014
Posts: 282
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From: Albany GA
it definitely is kind of a mess and could be cleaned up... what kind of pump are you running?... in tank or secondary?... are the lines from the tank stock or has it been tapped with a bulkhead, etc?... I'm wondering why whoever put that system together didn't hook up the vacuum line to the regulator and boost reference it... that way your pressure will rise under boost instead of drop... where are the lines on the passenger side going?... the pic doesn't clearly show where they are hooked up
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if you ran only one line to your regulator did you plug the other side and if not where is that other line going?... the way you described that you cleaned it up you could plug the other end of your regulator... you might as well hook up the vacuum line and have the tune cleaned up
Thread Starter
Racer
Joined: May 2014
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From: Albany GA
if you ran only one line to your regulator did you plug the other side and if not where is that other line going?... the way you described that you cleaned it up you could plug the other end of your regulator... you might as well hook up the vacuum line and have the tune cleaned up
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does your regulator not have a fitting on the bottom, that's the line that should go back to the tank... like I said it's hard to tell where it's going on your pics... it looks like the regulator is tied into 2 lines with a "y" but doesn't show where they are tied back in... it looks like one goes to the passenger rear rail, what about the other one?
Last edited by StingrayRebel; Apr 6, 2015 at 11:15 PM.
Le Mans Master
Joined: Feb 2004
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From: York PA
does your regulator not have a fitting on the bottom, that's the line that should go back to the tank... like I said it's hard to tell where it's going on your pics... it looks like the regulator is tied into 2 lines with a "y" but doesn't show where they are tied back in... it looks like one goes to the passenger rear rail, what about the other one?
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Thread Starter
Racer
Joined: May 2014
Posts: 282
Likes: 0
From: Albany GA
does your regulator not have a fitting on the bottom, that's the line that should go back to the tank... like I said it's hard to tell where it's going on your pics... it looks like the regulator is tied into 2 lines with a "y" but doesn't show where they are tied back in... it looks like one goes to the passenger rear rail, what about the other one?
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ok well it should work that way it's just cluttered, not sure if that would create the problem you are having though... I would still hook up vacuum to the regulator and have the tune looked at and tweaked if necessary... do you have any idea when the secondary pump kicks on?... your in tank pump may not be going bad but if the secondary pump is coming on too late your tank pump could be maxing out before that switchover... might check to see if you have an adjustable hobbs switch and see where it is set... I am no tuner so I couldn't tell you what to do other than have them look at the tune and tell you where you need to set it to come on
Thread Starter
Racer
Joined: May 2014
Posts: 282
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From: Albany GA
ok well it should work that way it's just cluttered, not sure if that would create the problem you are having though... I would still hook up vacuum to the regulator and have the tune looked at and tweaked if necessary... do you have any idea when the secondary pump kicks on?... your in tank pump may not be going bad but if the secondary pump is coming on too late your tank pump could be maxing out before that switchover... might check to see if you have an adjustable hobbs switch and see where it is set... I am no tuner so I couldn't tell you what to do other than have them look at the tune and tell you where you need to set it to come on
And thank you for your replies!! I will add a picture of the work I did to simplify the setup.
Last edited by joewom; Apr 7, 2015 at 08:37 AM.
Pro
Joined: Feb 2006
Posts: 718
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From: Jacksonville , NC
Couldn't bring up your first two pics because I'm at work, so I cant help with the plumbing, but I will throw this out. Check that you have a early style fuel filter (the one without the fuel regulator in it. I am running about the same HP as you are and I am running an LPE in tank pump, stock fuel rails with a regulator and return line with a early style fuel filter. I hold 60 psi throughout.
Thread Starter
Racer
Joined: May 2014
Posts: 282
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From: Albany GA
Couldn't bring up your first two pics because I'm at work, so I cant help with the plumbing, but I will throw this out. Check that you have a early style fuel filter (the one without the fuel regulator in it. I am running about the same HP as you are and I am running an LPE in tank pump, stock fuel rails with a regulator and return line with a early style fuel filter. I hold 60 psi throughout.
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what year is the car?... up to early 03 the filter should be on the inside frame rail, if you get under the car you should see it on the driver's side near the rear wheel... it should only have one in and one out if it's the 97-98 style filter which you should have with a return style fuel system... also what is the vacuum fitting on your rails for?
Thread Starter
Racer
Joined: May 2014
Posts: 282
Likes: 0
From: Albany GA
what year is the car?... up to early 03 the filter should be on the inside frame rail, if you get under the car you should see it on the driver's side near the rear wheel... it should only have one in and one out if it's the 97-98 style filter which you should have with a return style fuel system... also what is the vacuum fitting on your rails for?