Automobile Repairs

Six Symptoms of a Bad Fuel pump in your Car

Written by Autofot
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Today we are going to give you important information you need to know about your fuel pump in your car. The fuel pumps on most modern vehicles are electric and mounted in the fuel tank. However, some vehicles are equipped with inline or mechanical-style fuel pumps. 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 problem in the car and its performance.

1. Whining Noise

Whining noise in the Fuel tank is symptoms of a bad fuel pump. A good fuel pumps will produce a quiet hum during their normal operation; however, an excessively loud whine coming from the fuel tank is usually a sign of a bad fuel pump.

2. Decreased Gas Mileage

Always take notice of how often you’re fueling up your car. Fuel pumps have a relief valve; if the relief valve is failing to open, more fuel than necessary will flow into the engine system. If your vehicle typically gets decent gas mileage and then suddenly becomes a gas hog, there could be an emergency under the hood.

3. Hard Starting

Another commonly sign associated with a bad fuel pump is hard starting. Because fuel pumps constantly run whenever the ignition is turned on, they can eventually wear out and weaken over time. A weak fuel pump may still pump fuel, but not effectively to the smooth running of the car. Though, so many other factors could cause hard starting. So, it is important you call a good engineer to troubleshoot the car.

4. Engine Sputtering

Another symptom of a faulty fuel pump is a sputtering engine at high speed. Should you be driving at a consistently high speed and the engine suddenly sputter before returning to normal operation, this shows that there is issue within the fuel pump. In this case, the fuel pump cannot provide a constant stream of fuel to the engine at the ideal pressure.

5. Loss of Power Under Stress

Another indication of a bad fuel pump is a loss of power when the vehicle is under stress — such as driving uphill or carrying a heavy load — or while accelerating. The engine shuts down because weakening parts of the fuel pump cannot keep up with the car’s heightened fuel demands in these situations. In these circumstances, the car will feel like it is unable to go or maintain the intended amount of power. If the fuel pump is the cause, it means it can no longer regulate fuel pressure accurately and provide the appropriate amount of fuel to the engine.

6. Car Surging

Irregular resistance inside the fuel pump motor may cause vehicle surging, and indicates a fuel pump in need of repair. Surging feels like the gas pedal has been used. However, it occurs at a random, consistent speed. If this happens often, it may be because of problems within the fuel pump.

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About the author


Autofot is a website that blogs on the importance of taking good care of our automobiles. Little things that are ignored matter the most, hence we try to educate car owners and other different auto owners on how to go about taking care of their cars with little or no cost.

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