Truck is currently back in the shop so I can't say for sure what it is doing now, but before I took it to the shop the first time I could get the truck to start by priming the TB so I assume spark is/was good. I never did check spark when it wasn't starting. I can definitely hear the new pump (ACDelco) kick on when I turn the ignition on, but I did not check fuel pressure this time. Before I took it to the shop the first time I was getting a little over 10PSI when I put a gauge on it. When the shop tested it they said it dropped to 0, that is why it was replaced (also replaced the fuel sending unit at the same time). So, hypothetically, if fuel and spark are good, what would cause the truck to die while driving (no sputtering, just dies) and not restart unless the TB is primed? Even when priming, sometimes the motor would start and keep running or run until the gas I poured in was used up. My current list of possible culprits is: Ignition module, pickup coil, oil pressure switch, ECM, a short.
PS. No CEL, I did check for codes and the only code I had was 12.
Thanks for responding!
Thursday, May 14th, 2009 AT 4:17 PM