Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Silverado & Fullsize Pick-ups
Sign in using an external account
Register Forgot Password?
Search

Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by: Bakliner

Reply
 
 
 
 
LinkBack Thread Tools
  #1  
Old 05-06-2009, 04:00 PM
CF Beginner
 
Join Date: Jun 2007
Location:
Posts: 16
Default 5.7 vortec fuel pressure

I have a 98 z71 pickup, 5.7 vortec. can someone tell me what the fuel pressure should be? with key on engine off it is 56, with engine running it is at 52 for a few min then drops to 42 at which point it quits. fuel filter is new. Thanks, Russell
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
  #2  
Old 05-06-2009, 07:30 PM
Mike Sigmond's Avatar
Super Moderator
ROTM Coordinator
2003 Chevrolet Silverado 2500
 
Join Date: Apr 2009
Location: Orange County, CA
Posts: 1,955
Default

Could be a bad pressure regulator or pump. That 55psi pressure reading sounds about right when the motor is off then it cant keep up when running.

Just my 2 cents, lets see what the pros have to say.
__________________
Reply With Quote
  #3  
Old 05-07-2009, 02:28 PM
CF Active Member
 
Join Date: Jan 2009
Location: East Texas
Posts: 294
Default

When I first got my truck the pump and regulator were bad. If it takes a while to crank, but kinda starts faster if you give it some gas, it's the regulator. If it starts fast, but the fuel pressure problem is still there, it is the pump. What problems are you experiencing that made you check the fuel pressure? The drop you are experiencing was the fuel pump for me. Is the dying part the only problem you've experienced so far? I say the pump is the problem. The Fuel pressure regulator (fpr) is cheaper though. About 50 at autozone or oreilly compared to a 300 dollar fuel pump.
__________________
1998 Chevrolet Silverado
Long bed Extended cab
5.0 V8
199,900 miles
19 mpg

2008 Ninja 500
8700 miles
consistent 55 mpg

The new Project. (complete)
2001 Dodge Ram 1500
Short bed single cab
3.9 V6
89,000 miles
19 mpg (hmm...weird...)

Quote:
Originally Posted by EvansBlue View Post
lol oh ok. I misunderstood your false misunderstanding
Reply With Quote
Old 05-07-2009, 02:28 PM
 
 
 
Reply

Tags
1500, 1998, 2000, 50, 57, chevrolet, chevy, express, fuel, inline, location, motor, pickup, pressure, pump, regulator, vortec, z71


Thread Tools

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


Join Chevroletforum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 09:25 AM.

Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.

Emails Backup