PerformanceTrucks.net Forums

Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Fuel pressure at rail

Thread Tools
 
Search this Thread
 
Old 12-25-2007, 09:47 AM
  #11  
TECH Fanatic
Thread Starter
iTrader: (11)
 
phasemaster1's Avatar
 
Join Date: Aug 2005
Location: florida
Posts: 1,416
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by DrX
What is your FP with the vac line removed from the FPR? Did you check it with the vac line attached or removed?
I checked it with it attached, will try removing it.
phasemaster1 is offline  
Reply Like
Old 12-25-2007, 09:48 AM
  #12  
TECH Fanatic
Thread Starter
iTrader: (11)
 
phasemaster1's Avatar
 
Join Date: Aug 2005
Location: florida
Posts: 1,416
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by Doobie
50 psi is acceptable for a flex fuel engine...is yours FF?
nope not flex fuel engine.
phasemaster1 is offline  
Reply Like
Old 12-25-2007, 09:49 AM
  #13  
TECH Fanatic
Thread Starter
iTrader: (11)
 
phasemaster1's Avatar
 
Join Date: Aug 2005
Location: florida
Posts: 1,416
Likes: 0
Received 0 Likes on 0 Posts
Default
Originally Posted by tarinitup
I think your pressures are normal. MIne is also 50 at idle but what counts is pressure at WOT. MIne reads 58 at WOT.
didnt check it wide open dont think hose long enough will look into. I guess maybe I can just rev it up and see.
phasemaster1 is offline  
Reply Like
Old 12-25-2007, 09:58 AM
  #14  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 217 Likes on 173 Posts
Default
04 and up Have returnless fuel systems with means 58-62 at idle (mines 61psi)

03 and earlier have return fuel systems and are vac. referenced so idle should be around 50psi then increase as vaccum decreases. So you should get close to 58-60 at WO.
03sierraslt is offline  
Reply Like
Old 12-25-2007, 05:31 PM
  #15  
TECH Fanatic
Thread Starter
iTrader: (11)
 
phasemaster1's Avatar
 
Join Date: Aug 2005
Location: florida
Posts: 1,416
Likes: 0
Received 0 Likes on 0 Posts
Default
Thank you everybody as soon as I pulled the vacume line 58 psi was there.
phasemaster1 is offline  
Reply Like
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
FS: Duramax swapped RCSB 1500 4x4
thunder550
Trucks and SUV Classifieds
9
10-08-2015 04:53 PM
Stumble at start up after sitting for long periods
Mossyoakglock
GMT 900 Trucks General Discussion
4
08-28-2015 12:49 PM
fuel pump or some other issue? new pump from airtex?
05GMC4.8
GMT 900 Trucks General Discussion
5
08-07-2015 09:55 PM
Multiple questions about my setup, any input appreciated
GMCtrk
FORCED INDUCTION
67
07-17-2015 06:39 PM
Need help - Stumble at first cold start, dealer can't find anything wrong
Mossyoakglock
GMT 900 Trucks General Discussion
0
07-17-2015 08:30 AM
Back to Subforum
GM Engine & Exhaust Performance
View Next Unread
fast 90/90 installed




Advanced Search
Quick Reply: Fuel pressure at rail


Reply Closed Thread Share

All times are GMT -5. The time now is 08:28 AM.