fp problem or not

1

11secty

New member
when i turn my key to the on position my fuel pump pressurizes the lines but a couple seconds later it drops to zero

i thought i seen someone post that it should stay at lets say 45lbs
maybe this is why it takes a lot of turning over to stat my truck?
 
Jimmy

Jimmy

Banned
Re: fp problem or not

1.Stuck check valve in the fuel pump
2.Busted diaphram in the FPR
3.Injector stuck open.

Yes it should hold pressure without dropping once the system is pressurized. Check your oil,it's probably full of gas.
 
ghettosled

ghettosled

SYTY SUPERSTORE
Re: fp problem or not

did you re-use the pulsator when you did the fuel pump swap or the rubber line in the kit? FYI, many aftermarket regulators drop the fp to zero with the pump off so i dont think it is a serious issue. As long as you have adequate pressure and flow under hard throttle, it shouldnt matter.
 
scotts4

scotts4

ADDICTED
Re: fp problem or not

ghettosled said:
did you re-use the pulsator when you did the fuel pump swap or the rubber line in the kit? FYI, many aftermarket regulators drop the fp to zero with the pump off so i dont think it is a serious issue. As long as you have adequate pressure and flow under hard throttle, it shouldnt matter.
Click to expand...
if you do not use the pulsator and use a rubber hose will you fell alot of pulations on the fuel rail ? mine pulates like crazy
 
1

11secty

New member
Re: fp problem or not

i didnt put the pump in it was already in. i know the guy i bought it from had a shop do it, i have the reciepts.. and i think tomorrow ill relocate the fp gauge to the outside of the wiper cowl or in the truck but im a lttle iffy on that for one because its gas and two its liquid filled. but i will be able to see what its doing
 
Dr.Evil

Dr.Evil

Addicted to Boost
Re: fp problem or not

mine was doing that...I swapped out the FPR with an adjustable unit and it went away. Still took a bit of cranking to start though. I replaced the injectors and it fires right up now. Now I just need to figure out why it still runs so bad...
 
ghettosled

ghettosled

SYTY SUPERSTORE
Re: fp problem or not

scotts4 said:
if you do not use the pulsator and use a rubber hose will you fell alot of pulations on the fuel rail ? mine pulates like crazy
Click to expand...

i believe that often times, by re-using the pulstaor it is know to leak down the fuel pressure when the pump is turned off. I wouldnt hthink it has an effect on a vibrating fuel rail.. that is probably more or less the injectors.
 
1

11secty

New member
Re: fp problem or not

yep mine took alot of turning over to start until i put the 50 lbers in there now she runs mint ..Im just gonna relocate the fp gauge so ica see it when im running boost see whats ggoing on

thanks guys for all the help ill let you know
 
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