• Reasons Why High Pressure Fuel Pumps Fail in BMWs

    BMW High Pressure Fuel Pump

    The BMW is one of the most reliable vehicle models in terms of performance, build, and longevity. The car boasts of quality and cutting edge technology that has seen them dominate the automobile industry for decades now. This however does not mean that the car is perfect, as it can still develop issues as a result of wear and tear.

    One such problem that you are likely to experience with your BMW is the high pressure fuel pump failure. This is a device that serves to compress the fuel that is supplied into the fuel pump in order to bring up the pressure to the required high pressure. This high pressure is needed when injecting fuel directly into the combustion chamber so as to ensure that the engine runs efficiently. The high pressure fuel pump in your BMW may malfunction and fail as a result of a number of reasons.

    Causes of High Pressure Fuel Pump Failure

    Some of the factors of high pressure fuel pump failure include:

    Leaks in the injector pump

    Because of the high pressure that is created when injecting fuel directly into the fuel pump, there is an increase in the chances that a leakage can occur. These leaks will interfere with the functionality of the engine due to carbon build up.

    Poor quality of oil

    Using oil types that are different from the recommendations of the manufacturer may also trigger the high pressure fuel pump to fail. This is because the quality of oil may affect the rate of wear in the fuel pump.

    Lack of oil change

    Failing to change the oil in your BMW will also increase the friction between the camshaft and the lobes. When the oil levels are too low, then the friction increases. This will in turn increase the rate of wear and tear and further cause the pump to produce less pressure.

    Solenoid failure

    A solenoid is used to control the volume in a high pressure fuel pump. This it does by changing the port location in the pump. When this fails to happen the pressure in the fuel pump is lowered, causing failure in the pump.

    Signs of a failing fuel pump

    Some of the major signs that can indicate a failing fuel pump include:

    Losing power when accelerating or going uphill

    Accelerating, going uphill or carrying heavy loads all require the car to burn more fuel. Burning more fuel necessitates the fuel pump to put in more work in order to keep up. Experiencing difficulty in these situations could be a sign of fuel pump failure.

    Failure of the engine to start

    When the fuel pump fails completely, it will not be able to inject fuel into the combustion chamber at all. This will automatically lead to a complete stop of the car since no fuel will be reaching the engine to run it.

    Car jerking when accelerating

    When the engine stutters in the process of acceleration, the pump is likely to be failing. This stutter or jerking is caused by the failure of the fuel pump to inject fuel into the engine consistently due to the irregular pressure in the pump. While the situation may only last a moment before going back to normal for a while, this is a sign that you need to check the fuel pump in your BMW.

    Surge in the engine

    Surging in the engine is the situation where the car accelerates even when you have not pressed the gas pedal. It happens because when the fuel pump starts to fail, the parts will wear out at different rates creating a mismatch that causes the pressure in the engine to be inconsistent. These inconsistencies can cause a surge, which can be very dangerous when driving.

    BMW M2

    When the Fuel Pump Fails in Your BMW

    The best step that you can take as soon as you experience any symptoms that point to fuel pump failure is to have a professional mechanic take a look at it as soon as possible. This is because if left unchecked, the fuel pump failure can lead to damage in other parts of the engine as well. Taking your car in for regular servicing will also reduce the chances of your BMW’s fuel pump from failing. Getting help from our service technicians at German Motor Specialists will ensure that you get excellent service the very first time.

    * BMW M2 image credit goes to: teddyleung.

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