ok heres eh story i have a
H22 fully built turbo engine
aem fuel rail
aem pressure regulator
both are good they came from a running car
and 255 walbro

story: ok i had the fuel pump for about 4-5 month now and it worked great then i decided to swap my motor out and build it. so the car sat for 5 month straight then the time came. i dropped in my new motor with the aem fuel pressure regulator and aem fuel rail and 1000cc injectors with a loaded tune base map. When i go to prime the car it would read 40 psi then suddenly fall to 0 psi so i had to prime the car a few times and got the same result.So i decide to start it and when it ran the fuel gauge showed 0 psi at idle then it would die out. waht can the problem be?

 

bump for help

 

bench test the fuel pump, make sure the diaphram isnt ripped in the reg.

we have been seeing a bad batch of walbros come through.

 

You don't have a leak? (IE you don't smell any gas?)

I had a similar issue with my Aeromotive FPR. It started leaking. When I powered the pump the fuel pressure would go up to where I had it set then drop to 0. The car ran, but it wasn't a huge leak. Probably not much help to you, but if you don't have a leak I would suggest swapping out a the FPR for one you know works and if that don't work then test the pump.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by superturboprelude &raquo;</TD></TR><TR><TD CLASS="quote">ok heres eh story i have a
H22 fully built turbo engine
aem fuel rail
aem pressure regulator
both are good they came from a running car
and 255 walbro
</TD></TR></TABLE>
Check the rubber hose in the tank connected to the pump, make sure its still connected and not disintegrated like mine was

 

thanks guys found out that my fpr didnt have a O ring in the fpr opening which cause me to have a small lealk i couldnt see i guess my friend didnt put the O ring in or he had dropped it when he was tryin to install it on the fuel rail thanks again guys

 

well i guess the problem is not fixed yet please help me guys could it be the fpr? im goin to swtich to a stock one tonight and see any other suggestion please help thanks

 

also could a old or weak main relay make the fuel pump not pump enough fuel? or have no pressure?

 

dump bump

 

i dont think a weak main relay will do that. it is either there or not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Autoworks &raquo;</TD></TR><TR><TD CLASS="quote">
Check the rubber hose in the tank connected to the pump, make sure its still connected and not disintegrated like mine was</TD></TR></TABLE>
^^

 

any thing else?

 

any luck with the problem?