![]() One of the first symptoms of a problem with the fuel pump is a loud whining sound. Usually, a bad or failing fuel pump will produce one or more of the following 8 symptoms that alert the driver of a potential issue. Because the fuel pump is the component responsible for supplying the engine with the fuel required for it to run, any issues with it can cause major drivability and performance problems. However, some vehicles are equipped with inline or mechanical-style fuel pumps. The fuel pumps on most modern vehicles are electric and mounted in the fuel tank. When the key is turned on, the fuel pump is activated and pressurized, which can be heard as a quiet whine or hum in some cars. The fuel pump is responsible for delivering fuel from the gas tank to the engine at the appropriate pressure required for performance demands. Virtually all modern vehicles with internal combustion engines come equipped with fuel pumps.
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