98 cavalier , replaced............fuel pump,sending unit,filter, cam trigger,head gskt. Still when hot..............fuel pump shuts off. Its not the theft sys. What else could it be? Its not a plugged converter either. I disconected it to check.

On some chevys the oil pressure sending unit closes the circuit to continue the fuel pump to run after start. In the event of a wreck ,the car stops running thus no oil pressure thus turns off power to the fuel pump .A safety to help prevent fires. When you first start the car, the computer turns on the fuel pump for about 20 seconds just enough time to start and allow the oil pressure sending unit to close the circuit to allow it to continue running. when the car car has NO oil pressure or the sending unit fails ,it will start then shut down..as many times as you try to start. replace the oil pressure sending unit and secure a good conection. Dan

The fuel filter is Under vehicle, center, below seating area, front of fuel tank, mounted on chassis.
I haven't had a filter so clogged that it shut off the pump. Relays should re-set themselfs. If changing the filter doesn't clear the problem, then I would start looking at the pump itself.

no ther is a relay that is triggered from computer that sends power to fuel pump your fuel pump is probibly burned out you have to test for power at the sending unit on tank open gas cap have a friend turn key on not crank just on listen close you will hear a humm for 1-2 sec when ign is turned on from fuel pump you dont hear anything then check and replace fuel pump

hope this is helpful if so vote for me or leave a comment good luck

If your oil pressure gets to low it can turn off the fuel pump. This may also have saved your engine. The ECM turns on the fuel thru the fuel pump relay for about 5 seconds. When engine is running oil pressure sender supplies the voltage to the pump. When engine shuts off check oil pressure and voltage to fuel pump.

Under the car, center, below seating area, front of fuel tank, mounted on the frame.

Generally when this happens all the time the fuel pump relay has gone bad. Upon starting any GM car up the fuel pump operates off the third wire on the oil pressure switch. When the oil pressure reaches operating pressure which happens in a few seconds the computer shuts off the current from the oil pressure sending unit and opens the circiut flow to the fuel pump relay. The relay will run ythe fuel pump until you shut the engine off. Replace the fuel pump relay and you shall have a good running car again

remove the gas tank, undo the ring that holds the sending unit , replace fule pump and new sock filter, reinstall

if it only stalls hot relace the ign module on distributor

first is it getting fuel ? try shooting a little gasoline or starting fluid into the air cleaner and see if it will run ? if so it is needing a fuel filter or a fuel pump replaced... thanks and holler if you need more Jerry

If it is fuel injected it will get enough fuel to start but not stay running. I had the same problem with my S10. Turns out the hose that went on to the end of the fuel pump was roted. pull the sending unit and check the hose connections to the pump and the sending unit. If problem presists replace filter first the pump.