Fueling & Injection Fuel Pumps | Injectors | Rails | Regulators | Tanks

Fuel pressure question/problem

Thread Tools
 
Search this Thread
 
Old Dec 7, 2005 | 06:53 PM
  #1  
Jeremiah's Avatar
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Sep 2004
Posts: 1,332
Likes: 0
From: Mustang, Ok
Default Fuel pressure question/problem

Other than dual walbro pumps and SVO 42# injectors I have a stock fuel system. The fuel pressure has been 76psi and would level off a 70psi consistently. The last time I drove the car it was showing 60psi, what would cause the pressure drop? I was told the factory regulator may have failed and that could cause the pressure drop?

I was in the process of installing aftermarket fuel rails and regulator with return, I would like to have a good general idea what to expect or look for when I do the upgrade.

Thanks for your help guys!
Reply
Old Dec 7, 2005 | 08:01 PM
  #2  
onfire's Avatar
Coal Mining Director
iTrader: (17)
 
Joined: Nov 2001
Posts: 4,442
Likes: 0
From: Virginia
Default

The rgulator is just an orifice...would be hard to fail since it's a hole...pressure would go up if anything. I'd guess you have a leaky connection at the pumps or one pump is going south...are you sure both are pumping?
Reply
Old Dec 7, 2005 | 09:56 PM
  #3  
Jeremiah's Avatar
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Sep 2004
Posts: 1,332
Likes: 0
From: Mustang, Ok
Default

Originally Posted by onfire
The rgulator is just an orifice...would be hard to fail since it's a hole...pressure would go up if anything. I'd guess you have a leaky connection at the pumps or one pump is going south...are you sure both are pumping?
Not sure if both are pumping, they are both new with approx. 1000 miles.
Reply




All times are GMT -5. The time now is 09:34 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE