5 Symptoms of a Bad Car Fuel Pump and Replacement Cost

The fuel pump is a valuable component to the internal combustion engine. Since there needs to be a mixture of fuel and air inside the combustion chamber, the fuel pump is responsible for pumping fuel from the gas tank into the chamber. The fuel needs this pressure to be transferred from the tank to the chamber. Otherwise, the fuel would just sit in the tank with no place to go.

The engine control unit of the vehicle controls the fuel pump and regulates how much fuel gets pumped. This is based on sensory information relating to the speed of the vehicle and the demand for power placed on the engine. If you step on the gas pedal to accelerate, the fuel pump will increase the fuel pressure so that more fuel goes into the chamber. If you brake or decelerate your vehicle, the fuel pump will pump less fuel. This is a fairly simple concept to understand.

The Top 5 Symptoms of a Fuel Pump Problem

When your fuel pump starts to go bad, you will notice a lot of negative symptoms that will cause you frustration and aggravation. They should be an indicator that you need to replace your fuel pump.

Below are the top 5 symptoms of a fuel pump problem.

Engine Sputtering – The fuel pump needs to be able to deliver fuel to the engine smoothly and easily. If there is a problem within this process, the engine will start to jerk or sputter as you accelerate at higher speeds. This can be attributed to more air entering the internal combustion chamber than fuel. When the problem first occurs, the sputtering will go on for a couple of minutes. But the length of time will increase as the fuel pump continues to go unreplaced.

Reduced Engine Power – A very common symptom of having a bad fuel pump is when you can no longer accelerate your vehicle at higher speeds. Since the engine requires more fuel to go faster, a bad fuel pump will prevent this fuel from getting into the engine. As a result, the vehicle will not be able to go faster when you step on the gas pedal.

Load Stress – If you normally transport extra weight or loads with your vehicle without any problems, then a bad fuel pump will change this. If you notice that your vehicle loses power as you accelerate up a hill or carrying a big load, then it can be attributed to the fuel pump going bad. Just make sure your engine is able to normally handle that amount of extra weight.

Engine Won’t Start – The worst symptom is when you attempt to start your engine, but it does not start. Of course, there are many reasons why this might happen, but a bad fuel pump could be one of those reasons. The engine needs fuel to begin the combustion process and start running again. If the fuel pumps cannot provide this fuel, then the combustion process will fail.

Bad Fuel Economy – A bad fuel pump will cause your engine to work harder than usual to sustain the power demands being placed on it. In some cases, the relief valve of the fuel pump will not open properly. This causes more fuel to enter the engine than is needed. Because of this, more fuel will be consumed which means you’ll need to go to the gas station more.

Read also: 5 Symptoms of a Bad Injector in Your Car

Replacement Cost

Looking for Replacement Parts?
We recommend PartsGeek.com or BuyAutoParts.com for the best prices and selection.

When you have a bad fuel pump, you will need to get it replaced right away. If you do not, then you will not be able to drive your vehicle. The replacement cost of a fuel pump is anywhere from $550 to $900. The cost of the parts will be somewhere from $460 to $590 while the cost of the labor will be about $90 to $200. You must factor in the taxes and fees on top of those costs too.

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