ok...so this has been happening ALOT lately...and at perfect bottle pressure too. I FINALLY got my guages in today and this is what I discovered....when I spray...it's NOT a smooth pull like it used to be...it gets jerky (50-shot...stock fuel system, FPSS not hooked up) and now with my Fuel pressure gauge installed I can see whats happening. When I go full throttle off the bottle...my car pulls smoothly and normally..at 48-50 psi (FP). When I spray it hits HARD and pulls normally for about 2 seconds..and the FP comes up to around 62-63 psi...but then the acceleration gets all jerky and the FP guage needle jumps around.....my A/F guage just reads the same 3 green and 1-2 yellow the whole time. then when I let off the accel...the FP jumps to around 70psi...and then goes back to Idle pressure...do I need a new fuel pump??? Has anyone else experienced this???? Could it be my fuel pressure regulator??
Same problem I had, a weak fuel pump. Yes you need to upgrade to the Walbro GSS342.
Quote:
Originally posted by BriGuyMax
ok...so this has been happening ALOT lately...and at perfect bottle pressure too. I FINALLY got my guages in today and this is what I discovered....when I spray...it's NOT a smooth pull like it used to be...it gets jerky (50-shot...stock fuel system, FPSS not hooked up) and now with my Fuel pressure gauge installed I can see whats happening. When I go full throttle off the bottle...my car pulls smoothly and normally..at 48-50 psi (FP). When I spray it hits HARD and pulls normally for about 2 seconds..and the FP comes up to around 62-63 psi...but then the acceleration gets all jerky and the FP guage needle jumps around.....my A/F guage just reads the same 3 green and 1-2 yellow the whole time. then when I let off the accel...the FP jumps to around 70psi...and then goes back to Idle pressure...do I need a new fuel pump??? Has anyone else experienced this???? Could it be my fuel pressure regulator??
Originally posted by BriGuyMax
ok...so this has been happening ALOT lately...and at perfect bottle pressure too. I FINALLY got my guages in today and this is what I discovered....when I spray...it's NOT a smooth pull like it used to be...it gets jerky (50-shot...stock fuel system, FPSS not hooked up) and now with my Fuel pressure gauge installed I can see whats happening. When I go full throttle off the bottle...my car pulls smoothly and normally..at 48-50 psi (FP). When I spray it hits HARD and pulls normally for about 2 seconds..and the FP comes up to around 62-63 psi...but then the acceleration gets all jerky and the FP guage needle jumps around.....my A/F guage just reads the same 3 green and 1-2 yellow the whole time. then when I let off the accel...the FP jumps to around 70psi...and then goes back to Idle pressure...do I need a new fuel pump??? Has anyone else experienced this???? Could it be my fuel pressure regulator??