In most injected vehicles, the computer determines whether the engine is actually running or being cranked before engagning the fuel pump. Once the fuel is up to pressure many pumps are turned off. You'll need to find an electrical diagram of the vehicle, find the wire that powers the fuel pump and make certain that power isn't comming on briefly when you first turn on the key switch. The diagram will also help you identify the relay that runs the fuel pump and any other relevant information. Good luck. hers a hint that could help ya out..the inertia switch in trunk on left side behind covering is a relay.might need reseting or check to c if its getting power on both wires..it should ..also just behind front passenger headlight you'll see a large blackish module the fuel pump relay is integrated in that..there should be a data link connecter on firewall of passenger side you will see 6 point holes 2 on top 4 on bottom..looking at it with the 2holes on top your gonna want to ground the left one.with a jumper wire if the fuel pump starts to operate with it only being grounded by link connector your most likely defective component is the pcm..power control module..main computer of car.....dont forget to check fuel pump fuse and all main fuses in engine compartment.....when grounding the data link connecter all it does is bypass the pcm itself.and checks the whole fuel pump circuit..relays etc.fuses.so if it does work by doing that and only when doing that the pcm is defective.good luck
yes, there should be power if key is on
Check the electrical plug at the fuel pump for melt-down damage. Check the inertia fuel pump shut down switch. Check the fuse. Check the relay.
I would expect that the power for the fuel pump would be supplied through the ignition switch so I would start there, that is check the ignition switch.
Check all fuses and fuel pump relay. Check the fuel pump inertia cutoff switch in the trunk.
Yes this is a safety feature found on some cars that is an inertia switch. Power is cut to the fuel pump whenever the car is in an accident. You push the switch to reset it and restore power to the pump. There is also a fuel pump relay, that is sometimes called a switch, although it is not actually a switch. This relay closes and turns the fuel pump on when the ignition is turned on. It will stop the pump if the engine is not started.
Check there is power to the fuel pump via the connector at the tank. Check fuel pump relay and fuses related to this. Or if there is a fuel cutout switch on this somehwere. If not, then need a fuel pump.
Chevy trucks did not have a inertia switch. You need to check the fuel pump fuse and relay and then make sure you have power back to the fuel pump that's in the fuel tank.
not realy you need to check if is fuel related and if it is check inrtia switch first to make sure you getting power to fuel pump and injector pulse
broken wire or bad switch
Most users of the fuel pump shut-off switch is near the starter button in a location where a thief would not find it. You can hear when the fuel pump switch is turned on and of course when turned off there would be no noise.
have starter motor checked. ford starters will run a battery down when swithed off if they are worn out.also check ignition switch Check the fuel pump relay. It may be sticking.
I would expect that the power for the fuel pump would be supplied through the ignition switch so I would start there, that is check the ignition switch. Also check the associated wiring for cuts or possibly a loose plug connection.