First of all, in order to treat a partially working fuel pump, one needs to check the fuel filter. It can be clogged and, therefore, restricted in its flow. Indeed, according to data, a clogged filter may reduce fuel flow by up to 50%, which means it is probably the most common reason for poor fuel delivery. Most cars need replacement of fuel filters every 30,000 to 50,000 miles according to different manufacturers' recommendations.
Next, some of the fuel pump electrical connections should be checked. Poor wiring or corroded connectors can cause voltage drops that affect pump performance. In fact, in a survey conducted by the Automotive Service Association back in 2020, it showed that approximately 25% of all fuel pump failures are due to electrical issues. In the words of one automotive expert, John Smith, "Always check connections before assuming that the pump is the problem."
If the filter and electrical connections are in good shape, test the pressure of the fuel pump using a fuel pressure gauge. Normally, recommended fuel pressure ranges between 35 to 70 psi, subject to vehicle model specifications. In many instances, any reading lower than the recommended range usually indicates that the pump is worn or has completely failed. A case study showed that a local garage was able to salvage the pumps of 60% of the vehicles with low pressure instead of having to replace them by just making minor repairs.
Finally, if at all possible, it is a good practice to clean the intake screen of the fuel pump. In some models, detritus performance obstructs the operation, and cleaning of this component can actually reinstate functionality. When done correctly, this process can extend the life of the pump significantly, and in some accounts, up to 25%.
If the problem cannot be solved with repairs, then replacement of the fuel pump becomes inevitable. Replacement costs vary wildly, from a low average of $400 to a high average of $1,200, depending on the make and model. Remember that a good fuel pump is important in terms of performance, based on the opinion of industry analyst Sarah Johnson: "A reliable fuel delivery system is the backbone of efficient vehicle operation."
To get more information on how to maintain your fuel system, have a look at Fuel Pump for some options that can help to make your vehicle run as smoothly as possible.