It should be as soon as you KO, the pump will turn on for 2 seconds. Then when you start cranking, the pump should come back on.
But if 42psi is what you get either way, your pump is "fine".
So, lets get back to basics. An engine needs 3 things to run. Air, fuel and spark. We know we got air. But is the fuel actually being delivered to the cylinders? Best way to test for spark....hold a wire. No don't do that. Just take a plug out and use the ground method. While its out, check to see if its wet with gas.
1997 Pontiac Bonneville SEi-SCRAPYARD
2000 Chevrolet Blazer LT 4X4 4.3L
2002 Chevrolet *-10 LS Ext Cab 4X4 5.7 V8