Results 1 to 4 of 4

What is Stock Fuel Pressure?

This is a discussion on What is Stock Fuel Pressure? within the External Engine forums, part of the LSx Technical Help Section category; Mine is about 58 PSI at Idle and around 50 PSI at WOT. I ask because I am getting real ...

  1. #1
    F-Body Freak
    Join Date
    Sep 2006
    Location
    Columbia, SC in my Garage
    Age
    37
    Posts
    36

    Red
    01 WS6(m6)

    Question What is Stock Fuel Pressure?

    Mine is about 58 PSI at Idle and around 50 PSI at WOT. I ask because I am getting real crappy gas mileage. I only get about 15-16 miles per gallon on the highway compared to over 25 miles per gallon like it should. I know my old 97 Z-28 (m6) got over 25-26 MPG on the highway. My 01 WS6 is a 6 speed also. Thanks Brad.
    Click the Link for Mod List
    The WS6

  2. #2
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
    Join Date
    Aug 1999
    Location
    San Diego, Ca
    Posts
    50,748

    Black
    383 Procharged & N20 Vert

    58 is about right

  3. #3
    F-Body Freak
    Join Date
    Sep 2006
    Location
    Columbia, SC in my Garage
    Age
    37
    Posts
    36

    Red
    01 WS6(m6)

    Could I be getting crappy MPG from my SES code? I have a P0420 and a P0300 code. I know the 420 code is saying my driver side cat is not working properly, I wasnt sure if it could be causing my sucky Gas Mileage. I am going to be swapping them (Cats) out soon, when I order the Dynatech LT System (w/High flow Cats). Would I hopefully get better Gas mileage? The 300 is random misfire, so I am swapping out my plugs tommorrow hopefully, to fix that code, I hope.

  4. #4
    Blown, Stroked, & Sprayed

    Ed Blown Vert's Avatar
    Join Date
    Aug 1999
    Location
    San Diego, Ca
    Posts
    50,748

    Black
    383 Procharged & N20 Vert

    Could be the misfires. Could also be a clogged cat.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Need Fuel Pressure specs for an '02 5.3 Flex Fuel
    By Fortune50 in forum GM Trucks
    Replies: 1
    Last Post: 09-04-2007, 09:18 AM
  2. Replies: 3
    Last Post: 10-02-2006, 07:23 PM
  3. Replies: 3
    Last Post: 04-01-2006, 04:59 PM
  4. Looking for gauges! nitrous pressure, fuel pressure!
    By texasss in forum Parts Wanted / Trade
    Replies: 2
    Last Post: 10-29-2005, 10:05 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •