![]() ![]() Disconnect the filler fuel hose and the electrical connection to the old pump. They’ll drain as much fuel as possible from the fuel tank. They’ll relieve the fuel system pressure and disconnect the negative battery cable. If there’s power and ground, the old pump is flawed.ĥ. If it doesn’t and the fuse and fuel pump relay function perfectly, they’ll check for power and ground at the fuel pump. If the vehicle’s fuel pump works, the issue should be resolved. Once done, they’ll check the fuel pump’s operation. If the fuse is damaged, replace it with a new fuse (same amperage).Ĥ. Next, they’ll find and verify the vehicle’s fuel pump relay and fuse. If it doesn’t, replacing the pump is essential.ģ. The fuel pump should hum for 2-3 seconds. They’ll locate the pump assembly in the fuel tank and have someone turn the key to the ON position - while the mechanic listens at the filler opening. Park the car on a level surface and set the parking brake. Here’s how a professional mechanic would go about a fuel pump replacement:ġ. However, we recommend hiring a professional mechanic as a fuel pump replacement involves dealing with gasoline (highly flammable). You can try to replace the old fuel pump yourself. ![]() In such cases, you’ll need to replace the fuel pump to maintain fuel efficiency, delivery, and overall engine performance. Bad fuel pump symptoms like difficulty starting or engine misfiring often signal impending fuel pump failure. ![]()
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