Well there is no shutoff relay, but there is a fuel pump relay that powers the pump.
I would check it first. The computer grounds the relay for 3 seconds when you crank the engine to boost fuel pressure. Once the engine starts the pump is powered only if you have oil pressure.
SOURCE: fuel pump not staying on 1993 k1500 350
Some GM products also incorporate the oil sender switch into that circuit for fuel pump, so that in case of an accident, engine shuts off, oil pressure drops, in turn, shuts off power to fuel pump. May be worth a look at what your getting for oil pressure, as well as checking switch/sender.
SOURCE: 98 mazda 2300 truck wont fire or start
check your coil and see if you have fire.if you have fire then you need to check your fuel pressure. i have a mazda 2600i that did the same thing and it was the coil .did your truck back fire when you shout it off?. if it did iam pretty sure its your coil.note there is a module in side the dis very few people know about this but they are not notted for going bad good luck
SOURCE: 1992 mazda 626 = not getting fuel,will start while
fuel filter should be located under the hood on the driver side below the brake master cylinder, fuel pump is in the tank some vehicles you can lift the rear seat bottom and get to pump others you have to drop the tank and remove the pump.
Testimonial: "thx,there was fuel on both sides of the fuel filter.i lifted the seat , removed the access pannel & it's getting power.i don't know how to remove it."
SOURCE: 1990 ford festiva no power to fuel pump. replaced
The pump should have a fuse in the fuse block. You need to check for power in the fuse block and you need to check power to the pump relay.
Sometimes there is a fusible link to the Relay. If you check the connector terminals for power where the Relay plugs in, you can determine if the fusible link has blown. You could have already replaced the bad parts and now need to restore power to the Relay.
SOURCE: Car won't start. No fuel to injectors. No
It is most likey a defective crankshaft position sensor. Was the PCM checked for trouble codes?
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