hello out there its great to be able to have a option, cause im about ready to get some gas and a lighter. i need to ask you all a couple question's got a 91 chevy 1500 4x4 short bed, engine that was in the truck decided that it needed to go to greener pastures. so i pulled the 350 out and bought a 1991 2500 with a 454 for 300 pulled the 454 had my buddy build a 700r4 with extra clutches and stuff. ok got engine in truck can not get fuel pump to turn on . i replaced the relay and the oil pressure sending unit and the pump it self. i can take the plug from the relay and put power to the middle wire and the pump will turn on and run for 30 seconds then shut off. my question's are this are the fuel pressures the same 350 to 454 tbi same year? and why cant i get the pump to come on with key. truck has 454 ecm. any advice i could get would be very helpful thanks for your time. chevstall

 

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