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Re: Fuel pump is not turning on when ignition is turned...
Its possible it could be a fuse.... hopefully.... check connections to fuel pump... but i think its malfunctioned hope this helps if it has....http://www.ebay.com/sch/Chevrolet-Impala-Fuel-Pumps/33555/bn_1350430/i.html?isRefine=true&_mwBanner=1
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Seems like a fuel delivery problem.
May be a bad fuel pump, clogged fuel filter or a fuel line problem.
What car make/model? What engine?
When it dies, try to turn ignition off immediately, wait a couple of seconds and turn the key quickly to the crank position (don't wait with the key in ignition-on position so that the fuel pump doesn't try to pump fuel into the fuel lines).
If it hesitates to start or runs significantly shorter before dying, you have pinpointed a problem with the fuel system.
Sometimes your key will magically lose communication with the ignition you can take your car to a dealer and they can reprogram for about $60 regulators are pretty cheap starting about$13
i would try that first very much doubt it's the fuel pump
but you can check this just by turning you key to acc and you will hear the pump kick in to bring fuel up to the rails and cut out .
Only way to be sure pump is working to specs is to have the fuel pressure tested. And to be sure it's not a fuel problem, test the pressure after the engine shuts off on its own. If fuel pressure is still at spec, it is likely an ignition problem-coil, ignition module, crank position sensor, cam position sensor-something like that. If fuel pressure is gone or too low, suspect a failing fuel pump.
Get a DTC scanner and see what it says...in the meantime, check that fuel pump relay and fuel pump. The humming sound is probably the heater blower motor or part of the HVAC system winding down after disconnecting from power.
are you geting power to the fuel pump?? On some vehicles the electric fuel pump primes when the ignition is switched on to acc (i.e when all the dash lights come on etc) and on other vehicles the fuel pump doesnt start untill you turn the ignition over to the "start" position. Id check the fuel pump was acutally getting power and go from there
Hi the ignition was turned to the acces. possition
it needs to be turned to the RUN possition.there is no power to the fuel pump only in the CRANK and RUN possition
then if there is still no power there then you need to trace the wiring
hope this helps