![]() Check the fuel pump fuse, fuel pump relay, and, if necessary, the wiring and other related sensors that the engine control module (ECM-car computer) relies on to activate the fuel pump, like the camshaft position sensor. If you don't hear this sound but the engine cranks when you try to start it, you may have a problem in the fuel pump electrical circuit.That means the pump is receiving power and it's responding. That's the sound of the fuel pump being energized. You should hear a whirring sound coming from inside the fuel tank for about two seconds.Ask an assistant to turn the ignition key to the ON position, but don't start the engine.Put your ear close to the fuel filler opening.
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