Howdy...
first things first... let's clarify what you are saying.
it turns over great, but won't start then later it turned right over. Uh.. this makes little sense. However I have magical powers and can translate.
The car turned over, started for a second and died. At that time it would turn over but not start again. Then half hour later it turned over and started, ran fine for a short distance and left her stranded. Step dad figures by the way it's acting that it's a fuel pump.So far the fuel pump, cam and crank sensors have been replaced and the car continues to do the same behavior.
Being a supercharged W body, it has a fuel pump resistor. Double check that my version of the story is right and that the car would start and stall right away. If so, pull the fuel pump speed relay out and bend either tab 85 or 86 so that it won't make contact and put it back in. That will put the pump into high speed mode all the time and would fix the issue as I wrote it up.
Or...we need you to clarify your story a bit further.
