I have a few questions,

first of all my 91 blazer 4.3L keeps dying right after i start it, and twice while i was driving it down the highway. also, recently my oil pressure has been jumping around and going really high, maxing out at 80 psi. I was wondering if the oil pressure sensor/sender (whatever its called) could be going bad (causing the maxed out oil pressure) and that causing my fuel pump to switch off? anyone know if this is possible, just curious before i replace the fuel pump again, been less then a year sence i did it the last time.

 

change the sender and see what happens.

 

I would replace the oil sending unit and see what happens.

There are 2, so you'll need to look at your old one.

1/4" threads, Niehoff part number OP24471, $20.49 at AutoZone
1/8" threads, Niehoff part number OP24501, $18.99 at AutoZone

I'd replace that first and see what happens. Just continuing my role as the AZ spokesman, lol.

 

when is the last time you changed the fuel filter. that could be why your not getting gas.
chris