Where is the fuel pressure/oil pressure switch/sensor on my 94 gmc jimmy.

What is your question?

replaced fuel pump, pump relay, intake manifold tuning valve relay, fuel filter, cranks over tries to fire sputters and dies. Cranks and cranks. Turn key off and on a few times and tries to fire again. Pump comes on for 2 seconds when i turn key on and kicks off. Shouldnt it continue to run?