Fuel pressure problem

Old 08-04-2008, 08:15 PM
  #1  
mopar1968
Senior Member
RACING JUNKIE
Thread Starter
 
mopar1968's Avatar
 
Join Date: Dec 2006
Location: Abingdon,Virginia
Posts: 3,579
Default Fuel pressure problem

:? Ok to start this, fuel pressure is running at 15 psi on pressure gauge, would not adjust down, replaced regulator with holley regulator, ran couple times, guess what 15 psi again, ordered a billet regulator from Ron Owens installed guess what ? you guessed it 15 psi again, i have adjustment screw all the way down flush with top of regulator to get 7 1/2 pounds. Any answer's to what may be going on? plugged filter? bad pump?
mopar1968 is offline  
Old 08-04-2008, 08:26 PM
  #2  
zipper06
Senior Member
RACING JUNKIE
 
Join Date: Jan 2006
Location: La.
Posts: 2,890
Default

Gage, not right, if the carbs are not leaking by i doubt if you really have have 15psi to the carb. I'm not a carb person, totally injection, so i could be way off o this one.

JMO

Zip.
zipper06 is offline  
Old 08-04-2008, 08:47 PM
  #3  
hammertime
Senior Member
RACING JUNKIE
 
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Default

1st thing I'd do is replace the gauge.
hammertime is offline  
Old 08-05-2008, 11:53 AM
  #4  
Scooterz
Senior Member
RACING JUNKIE
 
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,408
Default

Mopar: I have replaced 3 Holley reg's in 6 months... one of which had a good diaphram, but was allowing fuel by it from faulty machining... causing fluctuating fuel pressure. I have one guage on the dual feed, & another liquid filled unit separately now so I can check them against each other to make sure the pressure is right.
Scooterz is offline  
Old 08-05-2008, 02:48 PM
  #5  
mopar1968
Senior Member
RACING JUNKIE
Thread Starter
 
mopar1968's Avatar
 
Join Date: Dec 2006
Location: Abingdon,Virginia
Posts: 3,579
Default

:? I have allready replaced the gauge with a liquid filled one, three regulator's later still high pressure, no fuel flowing in carb, needles holding properly. :?: :?: By the way the gauge is mounted to one side of regulator and line to carb on other side of regulator :!: :!:
mopar1968 is offline  
Old 08-05-2008, 04:02 PM
  #6  
hammertime
Senior Member
RACING JUNKIE
 
Join Date: May 2003
Location: Coldwater, MI
Posts: 2,998
Default

Which fuel pump do you have ?
hammertime is offline  
Old 08-05-2008, 06:41 PM
  #7  
mopar1968
Senior Member
RACING JUNKIE
Thread Starter
 
mopar1968's Avatar
 
Join Date: Dec 2006
Location: Abingdon,Virginia
Posts: 3,579
Default

holley blue pump.
mopar1968 is offline  
Old 08-05-2008, 08:42 PM
  #8  
Scooterz
Senior Member
RACING JUNKIE
 
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,408
Default

You don't have a return right? Man.... that does not make sence... I can see why you are stumped right now. I wonder if a air is entering into the fuel system somehow...
Scooterz is offline  
Old 08-05-2008, 08:43 PM
  #9  
mopar1968
Senior Member
RACING JUNKIE
Thread Starter
 
mopar1968's Avatar
 
Join Date: Dec 2006
Location: Abingdon,Virginia
Posts: 3,579
Default

Right no return. I would love to go to fuel injection but know nothing about it.
mopar1968 is offline  
Old 08-05-2008, 08:46 PM
  #10  
Scooterz
Senior Member
RACING JUNKIE
 
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,408
Default

Amen to that... same here. The Holley blue... is it maxed at 15psi/output?? or can it produce more?
Scooterz is offline  

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service