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What Causes Abnormal Noise When a Car Fails to Start?

1 Answers

OMicah

07/29/25 1:33pm

There are several reasons why a car may fail to start with abnormal noise: Low battery voltage: This can cause no response during startup, preventing the starter from working. You can determine this by observing whether the instrument cluster lights dim significantly when turning the ignition switch. If confirmed to be due to a dead battery, you can jump-start the vehicle or replace the battery to start the car. Damaged fuel pump: This prevents fuel in the tank from being supplied for combustion. To diagnose, turn on the ignition switch and listen inside the car for the sound of the fuel pump operating. If there's no sound, the fuel pump needs replacement. If the fuel pump isn't completely damaged, you can try tapping the bottom of the fuel tank with a hard metal rod or similar object, which might sometimes allow the car to start. Besides a damaged fuel pump, the issue could also be caused by a faulty fuel pump control unit or relay.

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