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WON'T STAY RUNNING on 1991 Buick Regal

I HAVE A 1991 BUICK REGAL WITH A 3.8 ENGINE. MY CAR WONT STAY RUNNING AFTER REPLACING THE FUEL PUMP, TANK, LINES, FUEL FILTER, AND THE IGNITIODULE. I DONT KNOW WHAT ELSE TO DO. WHAT ELSE COULD BE WRONG. MY CAR HAS NEVER OVERHEATED. HAS TUNE UP AND REGULAR MAINTENANCE.

Asked by for the 1991 Buick Regal
Have you changed the crank sensor?
NO...WHERE'S THAT LOCATED...BY THE CRANKSHAFT???

OK, I HAD THAT CHECKED AND IT'S NOT THAT. iS THERE ANY OTHER RESOURCES OR METHODS OF TROUBLESHOOTING MY CAR.
check for vacuuum leaks my car wouldnt stay running and it was a broken pvc valve
2 more answers
Have you changed the crank sensor?
NO...WHERE'S THAT LOCATED...BY THE CRANKSHAFT???

OK, I HAD THAT CHECKED AND IT'S NOT THAT. iS THERE ANY OTHER RESOURCES OR METHODS OF TROUBLESHOOTING MY CAR.
check for vacuuum leaks my car wouldnt stay running and it was a broken pvc valve
had same problem did all the same stuff ended up being the bolt on the battery was not giving a good connection. try checking your battery connections.