6 Main Causes Of Fuel Pump Failure


Because of various reasons, the replacement of a fuel pump is a difficult and expensive task. By doing simple care you can avoid damaging e 85 pumps or any other fuel pump. For prevention firstly you need to know the main causes that are associated with fuel pump failure. We have described the main reasons behind a fuel pump in the given article.

Main Causes Of Fuel Pump Failure

In the past fuel pumps were easy to replace as they were separate from other parts but now in modern designs, they are difficult to access and expensive. You can avoid the replacement by avoiding the Typical Reasons for Failure. The recurring issues with fuel pumps failures are:

1. Fuel Starvation

The fuel pump is submerged in the fuel and the fuel will keep it cool and provide enough lubrication. A low fuel tank may become a reason for fuel pump failure as once the fuel is low, the pump must operate. Hard to pump the fuel from the bottom and lubrication and cooling will also be minimized.

2. Contaminated Fuel

Contaminated fuel can damage your vehicle’s fuel system. Sometimes the fuel tank itself has rust. Fortunately, the pump has a strainer but it can only remove the large particles and the small particles can pass through and can cause more damage.

3. Electric Problems

The fuel contamination can cause the wearing of combustor and brushes of the pump and because of this, for the same output, the motor requires greater current. Amount of pressure. Moreover, the connectors present inside the fuel pump can be burnt.

4. Ineffective Filtration

As described earlier filters are present in the advanced pump like an e85 compatible high flow fuel pump that can remove the large particles and the suspended particles from entering the fuel system. But what if the filter is clogged? Now not only the filtration will be affected but also the flow of fuel reduces and can cause other problems like backfiring or stalling.

Another main thing to keep in mind is that fuel filters are not available separately so a clogged filter means that you may have to buy a new fuel pump.

5. Over Heating

As described earlier a full fuel tank means that it will maintain the temperature of the fuel system but if the tank is not full the fuel pump will not be submerged and it can become hot and which may damage it. To avoid the situation, always keep the fuel tank as full as possible.

6. Corrosion

Corrosion can be the main cause of fuel pump failure. This occurs mostly if the car sits for a while and the tank is not completely full. Ethanol can attract the water present in the air and this water can corrode the pump. To avoid this situation, whenever you need to store the car either drain the tank or add an additive to prevent water accumulation.


The given article describes some common causes behind fuel pump failure. By knowing them you can avoid them or can enhance the overall life of your fuel pump. It can be concluded that by filling up clean fuel and keeping the tank full you can avoid most of the pump failure causes.


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