[webcat]

is it possible for a fuel pressure tester to leak pressure but not fuel ?

i visually inspected all the connections of the fuel pressure tester and put knapkins under them to catch any fuel that might leak out , theres no signs of any gas leaking out anywhere.

i'm testing direct pressure from the pump ( testing my fuel pump check valve) key on 59 psi and then within 4 minutes it dropped to 30 psi
i released the fuel psi from tester and about 5 minutes later did the test again , this time
key on 59 psi and then within 4 minutes it dropped to 40 psi

 

[Matrixx]

Hi webcat

After 2 steady readings like that, then no, it's not the pressure gauge. The gauge is showing you what is in the lines at that moment. At least you know which way to go to find the leak. Please keep us updated, Thanks.

 

[webcat]

Good to know , very very good to know

 

[gtkane]

To test the tank side of things, after the pump has run, clamp off the pressure and return lines, and check for drop. If it still drops, either an injector or the regulator is leaking.

 

[webcat]

i was gonna try somthing like that but all my fuel lines are metal or plastic looking stuff , i could'nt find a section where there was any rubber type fuel lines.

 

[gtkane]

Check beside the transmission belhousing...

 

[Matrixx]

Hi webcat

Just to clarify here. You mentioned "Direct Pressure" from the pump, Correct? I hope I didn't miss understand your first post, thanks.

 

[webcat]

yes direct pressure at the pump , i have the guage right at the fuel pump output

i dont think i need anymore testing
looks like i'm gonna have a check valve thats leaking down , after i fix that i'll look into it make sure thats my only problem
thanks Matrixx

 

[astro355]

I don't know if you found any rubber hoses yet but there are also some above the fuel tank. Just a thought.