Help! High fuel pressure?
Thread Starter
Teching In
Joined: Jun 2012
Posts: 23
Likes: 0
Help! High fuel pressure? OK so I've been chasing a load up problem, after going thru my coils, wires and plugs I figured I better check fuel pressure, went down to a buddy's shop, hookup up a gauge and primed the pump.....95 psi!! Started the car and it dropped slightly, rev the car and it drops slightly. Even tried 2 different gauges. Running a stock LS1 pump and a Corvette style filter/ regulator, help!!
Last edited by sumnerslayer; Aug 30, 2014 at 12:13 PM.
Thread Starter
Teching In
Joined: Jun 2012
Posts: 23
Likes: 0
Not one reply? I installed a new Vette filter/ regulator and still pushing 85-90 psi, I blew air into the tank thru the return line, there was some resistance but it took air, how free flowing should it be? How does the return in the pump work?
Thread Starter
Teching In
Joined: Jun 2012
Posts: 23
Likes: 0
Might give that a shot tomorrow but at this point I'm pretty convinced the problem is in the pump, I have a hard time believing the line is plugged or kinked, system isn't that old and problem just randomly occurred, I really don't wanna drop the tank because of the new exhaust, (all 1 piece pipes) so I guess I'll have to put in a trap door
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
The problem will not be the pump.
Draw a schematic of exactly how you have the system configured.
Sounds like either a blocked return, or you have plumbed the regulator wrong ( or if it is adjustable, adjusted it wrong )
or finally a faulty reg.
Draw a schematic of exactly how you have the system configured.
Sounds like either a blocked return, or you have plumbed the regulator wrong ( or if it is adjustable, adjusted it wrong )
or finally a faulty reg.
Thread Starter
Teching In
Joined: Jun 2012
Posts: 23
Likes: 0
Stock LS1 pump, a 3/8 feed line coming into the Vette filter/ regulator, a 3/8 going back to the pump hooked to the port marked "R". I know the plumbing is right because I didn't not have high pressure before this issue, the pump has a regulator built in, it is still in there, I've read if that fails its cheaper to just replace the whole pump assembly, I know the pump is fine, its obviously pumping fuel lol
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
