Coothethird
Newbie
Hello!
1998 k2500 suburban, 7.4 engine.
I am having a fuel pressure drop when accelerating for more than a few seconds at WOT.
At idle the pressure is around 55 psi, moves up to near 60 psi during tip in or slight throttle. If I floor it to accelerate, after just a few seconds the pressure drops below 40 psi.
The vehicle sat for a long time. The fuel pump completely died. I cleaned the tank, new Delphi complete pump/bucket/sender. New fuel filter.
Is it possible the pressure regulator, or some other component is letting it drop? I bypassed the relay and the pressure moves and holds at 60 psi, with engine off. So I thought the regulator seemed fine.
Or is the pump just not keeping up with demand? I haven't experienced any issues with new Delphi units before, but there is a first time for everything.
1998 k2500 suburban, 7.4 engine.
I am having a fuel pressure drop when accelerating for more than a few seconds at WOT.
At idle the pressure is around 55 psi, moves up to near 60 psi during tip in or slight throttle. If I floor it to accelerate, after just a few seconds the pressure drops below 40 psi.
The vehicle sat for a long time. The fuel pump completely died. I cleaned the tank, new Delphi complete pump/bucket/sender. New fuel filter.
Is it possible the pressure regulator, or some other component is letting it drop? I bypassed the relay and the pressure moves and holds at 60 psi, with engine off. So I thought the regulator seemed fine.
Or is the pump just not keeping up with demand? I haven't experienced any issues with new Delphi units before, but there is a first time for everything.