Riddle_3d
New Member
alright, im redoing a bunch on my '93 this weekend (dampner, ANOTHER flexplate (think that was caused by the dampner) newly acquired IP and injectors from a newer engine, slight FTB mod, plumb FP gauge in, new LP, etc etc. i know its alot lol) my question is, when i turn the key on, i hear no lift pump whurr. but, if the truck is running, and you put a pressure gauge in the WIF drain and crack the t-valve, 5 psi idling. could that just be IP draw/ gravity feed? i dont think theres an way my LP was working, so i believe it helped the IP go poo also.