ok i did a 305 to 350 and tbi to carb swap. the car cranks but im not getting any fuel to the FPR or lines....why? is one of the ground on the engine for the pump maybe? I didnt reconnect any of them besides the main one for the battery. could that be it?

 

The fuel pump is grounded at the tank. The grounds on the engine are for the chassis wiring and ECM. The ECM needs to be grounded to operate the fuel pump relay. No relay - no pump. No pump - no fuel.

 

is-there-anyway-you-can-wire-the-relay-to-an-ignition-switch

 

Ok I found the ground shortly after this post and connected it...fuel when i prime but runs out because the pump isnt staying on. whats up?

 

Did you swap over the oil pressure sensor that screws into the bock fitting just above the oil filter? It acts as a failsafe to cut off the fuel pump if the engine oil pressure drops to 0 (when it stalls, for instance). Could be something to look at.

 

no i didnt put that switch back its just plugged. Think that could really be it? my gauge is getting pressure...

the fuel pump relay the relay nearest to the fender on the drivers side?

i used a jumper wire and put two together and the pump came on but then sparked and stopped. now im not sure if its coming on at all.