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Discussion Starter · #1 ·
will you check to see how long it holds pressure when you turn the key on, then back off? I got a 255 from houston performance, and noticed that if I turn the key on, psi goes up to 35 or so where it should then back down to 0 in less than a second, regardless if I leave the key on or not. HP said it was normal for the 255s to bleed off pressure like that :bs: :rolleyes: . I think I got a bad pump and the return line check valve is screwed up and stuck open. I have no external leaks and no smell of gas anywhere, and thats way too much pressure to bleed out through the injectors in 1 second. It's also making it harder to start, but once it is started, it does hold the pressure where I set it.
 

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Discussion Starter · #7 ·
Bling said:
Fuel pumps have nothing to do with holding fuel press. when the engine is off. The FP reg. is responsible for that. If the reg. doesn't keep fuel in the rail then the vehicle wil have a hard start, long cranking etc. I'm guessing the regulator is at fault. Just my $0.02
I swapped out my kirban for a new stock one that I had and it did the same thing.

Also, I don't have a FP sending unit. I just hooked the gauge onto the schraeder (sp?) valve.

Thanks for the responses.
 
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