Cruising along yesterday when car seemed to be starving for fuel, but kept running, until it didn't. Stopped and refused to start, although it would crank. Once the tow truck driver dropped it off, I put a gauge on the schrader valve and turned ignition on. Nothing. Dry as a bone. Next checked fuel pump fuse and found it blown. Replaced fuse. Ran jumper wire from bat+ to G terminal on ALDL and the fuel pump came to life. Bled the system down, then tried to start. Once again, nothing, and once again, blown fuel pump fuse. When I pulled the pump to look for obstruction, found a Delphi pump with a 4/21 date on it, so not very old. (I have only owned the car a bit over a year.) Also found the part number of FE0114, which appears to be an LT1 pump instead of an L98 pump, if that makes any difference. The FP relay appears to be original, but I doubt that would kill a running car. (If I am wrong about that, open to education.) I would have bet on a dead or dying pump except for the fact that it ran off the jumper. The oil pressure, fuel pump switch is only a few months old, and is a GM part, for what that is worth these days.
I noticed while comparing the correct FE0110 pump to the Fe 0114 pump, that the 0114 draws 8 amps (on a 10 amp fuse) while the 0110 pump only draws 5. I'm wondering if this incorrect pump just overloaded the circuit, although it hasn't affected it for the first year I owned the car.
Any ideas will be happily considered ( and yes, plenty of fuel in the car, lol).

 

Fuel pump relay can definitely kill a running car if it cuts off voltage to the pump.

 

Thanks. Good to know. I thought it was strictly used to prime the system when the key was turned.

 

I would think that an 8 amp draw on a 10 amp fuse is too close. I am not an electrical engineer. If this fuel pump is designed for LT1, have you checked to see what fuse goes in those cars? Maybe it is a 15AMP and that'd solve your problem????

 

I looked at a diagram of a 1993, and it shows a 20 amp fuse under the hood and then two 10 amp fuses on the interior box, so its obviously a considerably different system. The LT1 pump also shows an output of about 85 psi while the L98 one should be about 50, so everything is a bit out of whack here.