Bone Stock 5.0 Fuel Pressure

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carlp

New Member

Jun 26, 2005

59

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Apr 23, 2007

#1

• Apr 23, 2007

• #1

I am working on a stock 5.0 that has some driveabiltiy issues. What should the fuel pressure be at idle with the vacuum hooked up at teh regulator? With vacuum disconnected and plugged?
I could not find and answer to this when I did a search. Everyone seems to have different injectors, adjustable regulators, and diferent pumps. Please help.

 

ninety15.0

New Member

Mar 10, 2004

1,336

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Apr 23, 2007

#2

• Apr 23, 2007

• #2

38 or 39 psi with the vac off....

 

C

carlp

New Member

Jun 26, 2005

59

0

0

Apr 23, 2007

#3

• Apr 23, 2007

• #3

THanks I thought that is what is shoudl be. I am getting a reading of 27, so I don't know if it is the pump or possibly the regulator is going bad.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Apr 23, 2007

#4

• Apr 23, 2007

• #4

The spec is 30+ PSIG at idle with the vac line attached. If you have fuel line crimpers, you can carefully crimp the return line. If pressure goes up, that suggests the regulator might be at fault. If pressure stays low, I'd think pump or inlet line restriction.

Good luck.

 

4G-KDMP

10 Year Member

Jul 23, 2005

935

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CA

Apr 23, 2007

#5

• Apr 23, 2007

• #5

i'm lost here, is it

ninety15.0
38 or 39 psi with the vac off....

Click to expand...

or

HISSIN50
The spec is 30+ PSIG at idle with the vac line attached.

Click to expand...

or are you both saying the same thing but using different terminology?