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The relays along the firewall will make your car engine not to start. The fuel pump relay is what turns on the fuel pump when you start your car and powers it down when you shut off the ignition. The engine control module (ECM) uses the fuel pump relay to control when the fuel pump is on. The fuel pump relay supplies electricity to power up and power down the fuel pump. Once the points burn or the coil breaks, the incoming voltage to the fuel pump is blocked and your car engine cannot start. If engine takes a long time to crank up, it probably is due to a bad fuel pump relay. Another way you can tell the fuel pump relay is bad is when you don't hear the fuel pump run for a couple of second when you turn the key in the ignition forward to start the car.

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