Some telltale signs will show if a fuel pump has reached a point where it needs to be replaced. The average lifespan of a fuel pump is about 100,000 miles, but this will differ depending on driving conditions and the quality of fuel being used. Should a fuel pump start failing, this may lead to symptoms like engine misfires, stalling, and poor acceleration. One of the most common symptoms that show a malfunctioning fuel pump is when a significant drop in fuel pressure occurs. According to an AAA study, approximately 10% of vehicles suffer a fuel pump failure resulting in inadequate fuel delivery to the engine, and this may cause stalling or problems in starting the engine.
Variations in the working pattern of the engine, like nonavailability of power or weak acceleration, can also give a hint of a malfunctioned fuel pump. When the fuel pump cannot provide the required pressure, the engine does not get enough fuel, which results in hesitation or poor throttle response. The fuel pressure should be within a normal range of usually 30 to 60 psi, depending on the vehicle. This can be measured with a fuel pressure gauge; anything below the recommended pressure could indicate a failing fuel pump.
Another symptom is strange noises coming from the fuel tank. Noises, whining, or buzzing can indicate wear of the internal parts of the pump. The ASA describes such conditions as noise, usually the result of the internal parts of the fuel pump, which starts wearing out. Fuel pumps that produce excessive noise may be failing as a result of internal wear and contamination in fuel. This noise is generated by the pump’s motor straining to circulate the fuel well. If such a noise does not stop, then it might be time to change the fuel pump.
In addition, sometimes a fuel pump failure may trigger the check engine light. The onboard diagnostics system of the vehicle may detect a malfunction in the fuel delivery system, signaling potential problems with either the fuel pump or fuel pressure regulator. Fuel pressure-related DTCs or pump failure-related DTCs can confirm the requirement of a replacement. Error codes on fuel pressure or pump failures might pop up in that situation-in an F-150, it would trigger code P0230 for primary circuit malfunction in the fuel pump relay.
Another symptom of a failing fuel pump is erratic fuel gauge readings. A faulty fuel pump can send incorrect signals to the fuel gauge, especially if the sender unit is malfunctioning. This may cause the driver to run out of fuel unexpectedly, as the fuel pump is no longer able to supply fuel at the rate required.
Other signs of a failing fuel pump include if the car continually stalls after a tank of fuel is close to being empty or while driving at low speeds. According to a study done by CarMD, stalling while idling or at low speeds occurred in 12% of cases related to fuel pump failures. This usually occurs when the fuel pump cannot sustain the proper fuel pressure or when the pump is clogged.
In most cases, the fuel pump replacement is the most reliable. Replacing a faulty fuel pump can restore fuel delivery to the engine, improving overall performance and reliability. A faulty fuel pump should not be allowed to continue in operation for too long, as further operation with one can lead to continuing engine damage and the possibility of being stranded due to sudden failure. Replacing a fuel pump is an investment in engine health, preventing more costly repairs down the line.
A faulty fuel pump is not something to take lightly. If your car exhibits any of these signs, such as erratic behavior by the engine, stalling, or a drop in fuel pressure, it is important that the system be checked without further ado. Immediate fuel pump replacement upon the appearance of these symptoms will help the vehicle keep engine performance and avoid further significant issues. If looking for a reliable Fuel Pump, it is worth investing in high-quality replacement parts matching the specifications for your particular vehicle.