Oldsmobile/Buick Repair: run great dies in the middle of highway 1987BuickPark Ave 3800 engine, 3800 engine, oxygen sensor

Question
Have replaced ECM,crank sensor ,oxygen sensor,plug wires.new fuel lnes.solenoid egr value.Taken to dealer no diagnostic codes shown.Am about broke. I leave it sit half hour starts like a dream runs like a deer. then bam.Im walking.and the dealer is lost.Caris in excellent condition.Where do I go from here .Thank you

Answer
hi t, well sure sounds like a fuel pump to me t.a fuel pump can overheat and stop pumping fuel.or the wires at the pump get corroded and stop supplying voltage to the pump.and really don,t know why the dealer is lost this is the most common prob,they should have reccomended a pump.good luck please take a min of your time to rate my help ty billymac..........