Oldsmobile/Buick Repair: 1989 buck lesabre, crankshaft position sensor, buick lesabre

Question
on a 1989 buick lesabre 3800cc eng car runs fine,then when you shut it it will not restart,until about an hour later it starts right up! it cranks and i checked for spark and put screwdriver in 2 wires and no spark,soi changed the module and coil,it started right up 5 times,drove for gas and wold not restart again. was not getting fuel,waited an hour and it started right up.Is this a common problem back then or do i need to continue process of elimination? I would hate to change the fuel pump uneccasarily. Thank you

Answer
Hello Nick,
I appologize for not answering the question sooner.
I was out of town, and signed out on vacation, but the All Experts system let me down, and didn't get my vacation posted.I don't know of any problem like that for which there is no cure, so continue the process.
Spark, or Fuel??
Gonna have to narrow that down.
Is the fuel pump running? Should hear it for three seconds. If not, there is a fuse, and relay that could also be at fault.
But if there is no spark, the fuel won't fire anyway.
What could affect both systems?  Ignition switch?

Crankshaft position sensor could keep both spark, and injector pulse from happening, if I'm not mistaken, so get a manual, and check it, or a cam sensor.
Van