my truck tore up on me a while back(93 1500 ex cab, 2wd,5.7L)...wouldnt start or anything....i figured out it was the fuel pump so i replaced the fuel pump and send unit...after that it ran like crap...rough idle, no power, wanted to die at idle...since then i have replaced the spark plugs, the fuel filter bout 4 times,& the throttle position sensor....now it is runnin better but it has no power and tries to die out around 1500-2500RPMs it runs fine at high RPMs....but when you put it to the floor it wants to die until it shifts out then it runs fine


any ideas i dunno what it could be

 

FPR (fuel preassure regulator) or timing? did you get the right fuel pump with the right preassure rating?

 

yeah i got the one it called for...im thinkin it might be the timin...im checkin that today...i replaced the distributor cap and rotor button and its runnin a lot better but it still wants to hesitate and still tries to die at idle until it gets warmed up...im wonderin if i might have a bad plug wire on it...what yall think?