Ive had non stop rough idle/drivability issues with my Stealthrammed 383.. so yesterday i was watching my fuel pressure gauge and all of my fuel pressure is gone or down to 10 psi in under one minute once the car is shutoff.. I know ive heard that Holley AFPR are bad for this but damn! So im thinking i could have an injector that is leaking massively?
Thoughts? thanks...

 

well to add some more info to this.. I was just out looking at the car, and when i rev it to about 2-2500 the fuel pressure drops from 40 to about 36 ish

 

is your fuel pump up to feeding a 383?

 

yea, I still have the stock pump i imagine that on its own is a good enough reason to upgrade to the walbro 255

 

I'd bet a dollar to a dime that your P.O.S. Holley AFPR has a torn diaphragm.

I have been having really poor luck with mine. I think that if you set it, and then adjust it again (while under pressure?) it will always tear! They suck! I just replaced the diaphram, THREE days later I tried to move it from 46 PSI to 49 PSI, and the same damn thing has happened agian!

I don't know why, but they always seem to tear. I have checked the diagram in the instructions, and I did install it per the diagram.

 

but yeah you will need a new FPR but a nice new pump will be great too

 

i hear taht some people who have holey have better luck when you just lightly tighten the bolts, dont torque them on there or the diaphram will always tear

 

"i hear taht some people who have holey have better luck when you just lightly tighten the bolts, dont torque them on there or the diaphram will always tear"


???? Do you have one? Or even know what you are saying?