brutal_gt

I have a 93 GT idles perfect and runs perfect until about an hour of driving it. at that point everything is still good until i get up around 4k rpms the i get some hesitation and power lose. i had the codes ran and nothing, no check engine light, changed out my cap and rotor, TFI module and im running 91. My fuel pump is making a **** load of noise though, sounds like i have a blender running in the back. my new pump will be here monday, is that most likely the problem now?

DR8907

Honestly I dont know for sure but from the way you described the noises your pump is making I would kind of assume that had something to do with your problem.

brutal_gt

hmm now its not doing it. im still gonna change that stupid pump though. anyone running a 110lph pump with no regulator?

86HOGT

It should be fine, since you have a regulator already, it's just not adjustable.

primetime5.0

does it run fine when its at full throttle? if so it may be the 02's thats what mine used to do before i replaced them

brutal_gt

yeah i meant with the stock regulator

yeah it ran fine full throttle up to about 4grand. it went away for now but i have a feeling it may return. i think im gonna replace to o2's also then.

settled4automatic

well, since ur gettin the new pump, just try that for a while first. if it keeps acting up with the new pump, THEN consider some o2's or something else. always try to test out one part at a time when applicable :P