Is there a shut off switch ia 2000 pontiac sunfire if so where? the fuel pump is new plus i changed the spark plugs and wires the relay for fuel pump and changed coil cap. the fuel pump will come on if you jump the relay swith .why this?

the 2001 sunfire does not have a fuel pump reset switch such as fords do what gm does have on most of ther cars and trucks is a fuel pump test lead thry can be most any weteunder hood ur looking for the single red wire usually takepes up has a blk single plug on the end of it send posiyive battery juice to it and ur pump should coe on if its good if cany find that pull ur fuel pump relay ck for power to relaywith key on if u have piwer to rlay swap with other relay next to it and see if pump comes on should run3secinds when key cycled if dont chances are its ur pump or the wiring on the top of pump they liked to burn out or corroded

Borrow a fuel pressure tester from Auto Zone and test the fuel system. It could be that you have a bad fuel pump or fuel pressure regulator. It also could be a plugged fuel filter.

Could be ECM/PCM but you need to go further and diagnose it. trace fuel pump wires and find out if there is a fusible link or break/bad connection. If you have another ECM you can try it. is there power at the relay? at the fuse? Ignition module?

GM doesn't use a fuel pump shut off switch, the safety system works like this, fuel pump is turned off if the engine oil pressure goes to zero with the key in the run position. Ford uses a shut off switch that is activated by an impact exceeding 3 G's (3X the force of gravity), it is called the fuel pump shut off inertia switch.

Classic bad ground to the fuel pump...Mine did it untill I hard wired it to a switch with a power light. Car stalls light out I throw the switch and im in control but remember to shut it off or your battery will be dead lol.

It wouldn't hurt to change the fuel filter. I would check the fuel pressure. You may have a bad idle air control valve. I would also check for any vacuum leaks, spark plugs and wires.

I'd want to check voltage and ground for fuel pump relay. The load side of relay is the line with arrowhead, when relay is energized that line with arrowhead moves to other terminal and sends voltage to fuel pump on gray wire. The control side of relay is that coil symbol, it has to have voltage and ground, the voltage comes from pcm, the ground is a chassis ground. The voltage for load side of relay is fuse protected, fp/inj fuse.

It is very likely the fuel pump in the gas tank has failed check the fuel pressure, u do this at the test port on the top of the engine near the fuel injector supply tube, it looks like a metal tire stem.

This is Caused by the Fuel Pump. If you remove the Fuel Pump relay and it will try to Crank, You have a Bad Fuel Pump. I do Believe that the Fuel Pump is located inside the Fuel Tank on the Sunfire. Not an easy Repair But, Necessary

I don't think its your fuel. Usualy we connected the kill switches to the ignition or power to the spark plugs. Just to make sure you can buy a can or 2 of brake clean thats what is call. you can buy it in autozone cragens or any autostore. When it does that problem that it doesn't want to start. remove the plastic hose that goes to your intake and spray a little while cranking(trying to start) if starts than your on the right track if it has no change you should start looking power for your spark plugs