The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-06-2013, 07:46 PM   #1
69sinker
Registered User
 
69sinker's Avatar
 
Join Date: Nov 2012
Location: eldred,il
Posts: 503
Too much fuel pressure

I have an 02 5.7 pulled from a camaro along with the camaro tank in my truck and had a line bust in the tank I replaced the line and checked the fuel pressure. Gauge read 85 lbs so I pulled the pump and replaced the internal regulator. Checked the fuel pressure afterwards and it was still 85 lbs, I even checked it with another gauge and still 85. Truck runs great but why such high pressure? I am in the process of running new lines but I'm wondering what to do about this?
I have 3/8 line with inline camaro filter and return line is from rail back to tank.
Posted via Mobile Device
__________________
My 69 cst lwb 2wd LS1 swap 5.7/4L60e build
http://67-72chevytrucks.com/vboard/s...d.php?t=589869
69sinker is offline   Reply With Quote
Old 08-07-2013, 05:26 AM   #2
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
Re: Too much fuel pressure

You shouldnt have a return line from the rail on an 02 camaro LS1. You should have a feed line coming out of the tank, then to a "T" with one side returning to the tank and the other going to the fuel filter and then the rail. This is IF you have the LS1 Camaro tank. Is this how you have it run? Sounds like you're dead heading the bpump.
Posted via Mobile Device
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html

5.3 swap into my RUSTY '71 C10
http://ls1tech.com/forums/conversion...71-c-10-a.html
ls1nova71 is offline   Reply With Quote
Old 08-07-2013, 12:55 PM   #3
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: Too much fuel pressure

x2, you shouldn't have an internal reg and still be running a return from the rail....it sounds like there is a weird mix of parts at work.

Camaro style has the on-sending unit regulator
Vette style would use the combo filter/regulator
Truck style has the on-rail regulator

...which are you running.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Old 08-08-2013, 07:21 PM   #4
69sinker
Registered User
 
69sinker's Avatar
 
Join Date: Nov 2012
Location: eldred,il
Posts: 503
Re: Too much fuel pressure

Thanks for the replies. I have a line run from the purge solenoid to the return side of the tank. So yes I have it all wrong. So now what do I do with the purge solenoid?

Thanks, Dave
Posted via Mobile Device
__________________
My 69 cst lwb 2wd LS1 swap 5.7/4L60e build
http://67-72chevytrucks.com/vboard/s...d.php?t=589869
69sinker is offline   Reply With Quote
Old 08-08-2013, 08:00 PM   #5
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: Too much fuel pressure

Throw it away? Most of us aren't running any of the emissions stuff, barring the dudes in the Communist Republic of Kalifornia.

You can run a vented gas cap, or run a short vent line with a breather or check. You don't need to hook up all the evap stuff or a charc cannistor etc.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Old 08-08-2013, 10:14 PM   #6
69sinker
Registered User
 
69sinker's Avatar
 
Join Date: Nov 2012
Location: eldred,il
Posts: 503
Re: Too much fuel pressure

Thanks for your help. I won't be running any emissions ...... For now, since I do live in the #2 rated communist state, Illinois.
Posted via Mobile Device
__________________
My 69 cst lwb 2wd LS1 swap 5.7/4L60e build
http://67-72chevytrucks.com/vboard/s...d.php?t=589869
69sinker is offline   Reply With Quote
Old 08-08-2013, 10:51 PM   #7
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: Too much fuel pressure

Hahah ya I have bench warrants there I think. They don't like me.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:00 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com