Traditionally, fuel pump vibrations have resulted from wear and maintenance requirements within the fuel system, components clogging or becoming misaligned. This is mainly due to blockage occurring in the fuel filter or in some other part of the fuel line, And that puts extra stress on Fuel Pump causing it Vibrates abnormally. As the system flows become impeded, these vibrations – which normally increase approximately 10-15% -- will result in functional damage to most of the internal components and increased wear rates. The statistics say that about 20% of high-mileage vehicles have their fuel pump starts vibrating more from all the sediments due to be accumulated in a tank over time.
Misalignment or incorrect installation is one of the factors that challenge pump vibrations. A fuel pump that is not mounted properly or whose holding bracket becomes loose over time can shift slightly and start to rub against nearby parts creating the hum noise. This problem is common in cars with a history of high engine vibrations above 50,000 miles and on off-road travels. Industry reports state, vehicles with pump mounts installed too loosely were 25% more likely to lead to vibration issues causing premature wear or failure of the pump.
Another contributing factor is the wear that happens internally in the pump itself, mainly on impellers and bearings. When this parts wear, the rotation of pump gets erratic and is able to cause a pulsating feeling which becomes felt by as vibrations. The electric fuel pumps used in most modern cars tend to operate at a pressure between 40-70 PSI and any deviation as a result of wear increases the likelihood that you feel some vibration. Research shows that when fuel pumps reach the tail-end of their 10-year, often somewhere around 100,000 to 150,00 miles depending on driving conditions they tend exhibit a little vibration — an otherwise easy-to-overlook sign of needing replacement.
As the late, great automotive genius Soichiro Honda put it: “The life value can be measured by how many times your soul is deeply stirring. In the engineering world, this same line of thought suggests paying attention to sights and sounds that may be slightly out-of-place like odd additional noise from a Fuel Pump. Regular maintenance that seeks out these early indicators — such as fuel filter inspection, tightening pump mounts and inspecting internal components for wear or stress points ahead of time — saves on the repair dollars while extending the life expectancy of your pump longer than anyone might have thought possible, further insuring smooth application delivery to ensure engine operation.