There are a number of reasons probably causing fuel pumps to burn out, with heat, fuel level, and wear on the components of the car influencing this greatly. The common cause of fuel pump burnout is low-level fuel, where normally the fuel pump depends on gasoline for cooling. Operating on low fuel forces the pump to work harder when it is not getting adequate cooling, thus cutting down its lifespan. They also show that frequent running of fuel at lower levels can decrease the life of the fuel pump by 25% or more, because the temperature of the operation becomes higher for the pump.
Clogged fuel filters also put added stress on the fuel pumps. A clogged filter causes the pump to work harder to get adequate fuel flow, thus increasing wear on the motor. For this reason, mechanics usually advise that the fuel filter change should be done every 20,000 to 30,000 miles to take some pressure off the fuel pump and enhance its efficiency, which would prevent burnout and extend operational life.
Other contributory factors include poor fuel quality. Poor-quality, adulterated fuel will introduce sediment and debris into the pump, causing clogs that will eventually lead to the damage of internal parts. These could be due to corrosion or buildup which interferes with the functioning of the pump. The use of good-quality fuel and cleaning of the fuel tank from time to time will prevent this, and in doing so, it could help extend the life of the pump by as much as 15%.
Low voltage or power fluctuations within the electrical system are another cause of early fuel pump burnout. The pump works under a normal voltage of about 13.5 volts for its appropriate functioning. These electrical problems can cause the motor to heat up or malfunction faster, hence accelerating wear. The ability to check electrical connections on a periodic basis with a voltmeter usually ensures that the fuel pump is getting good voltage so that it runs well.
Why do fuel pumps burn out? Some of the factors that contribute to wear and tear, leading to fuel pump burnout, include running low on fuel, clogged filters, poor fuel quality, and electrical problems. These measures will help ensure long life for fuel pump; this is a sure way to guarantee your car will be in good service and potentially eliminate the high costs of replacing them.