I have a 95 Lumina apv with a 3.8 starting running rough then died will run for a few seconds then blow the fuse for fuel pump checked wires they look good changed relay and fuel pump losing my mind over here

If it blows every time you attempt to start car, use a process of elimination......disconnect the Oil pressure sensor, disconnect the relay, and disconnect the injector harness......now attempt to start car...if it still blows, your problem is the pink wire, circuit 839, that feeds all three circuits you disconnected, it is grounded somewhere.....

If it doesn't blow, reattach one circuit at a time.....if you attach a circuit and it blows, you have narrowed it down to that circuit....