Lord Ashram

Hi all!

First time poster, hoping someone could give some advice...

I have a 2000 Mustang GT, supercharged. I had the intank replaced some time back (8 months?) with a 255 unit, the maker of which escapes me. Just had a new motor and tranny put in, and now my fuel pressure jumps up and down a TON, between 20-40. Under acceleration also I get a sputtering sort of power, with the car lagging repeatedly as the RPMs go up... someone said this was the sign of a failing pump, but I just had it done! Someone else said that it could have just been a crappy aftermarket pump and I should look into an official Ford 255 intank pump?

Anyway, anyone have any knowledge they could share about this?

Thanks,

LA

tripsevn7

walbro 255 pumps are great. did you test the voltage at the pump?

Lord Ashram

Howdy!

No, I have not... I dont know crap about working on my car, unfortunately... I am a complete car idiot But does this sound like something about the voltage not getting to the pump consistently and so it is functioning sporatically?

Sorry if this is a newbie question, but I am a newbie

Thanks, and happy holidays to all

tripsevn7

if your pressure is fluctuating at the regulator(20-40) then i would believe you have an issue in the tank. voltage could be the variable as well a bad pump bad filter

Lord Ashram

Awesome, thanks for the advice Trp! My car is having what I think might be horsepower issues (see my other post, made at approx. the same time as this one) and I wonder if the two are connected...?