Quality of fuel pump also ensures vehicle performance, reliability in areas otherwise characterized by low wear. A fuel pump of good quality can supply the proper amount of fuel at the right pressure — which is 40 to 60 psi for most modern fuel-injected vehicles — necessary to facilitate effective combustion, as well as efficiency in engine operation. The problem is many low-grade pumps do not have that kind of precision engineering to hold this pressure and it could eventually cause running problems like misfires, stalling, or even damage your engine on the long run.
Cheap pumps often have poor quality construction and are prone to rapid wear, residue and failure from fuel contaminants. This wear can decrease their efficiency and lifetime, resulting in the need to replace them long before a normally operating fuel pump fails after 100,000 miles of automotive service. Besides, lower quality pumps wear easily and may not do a thorough filtration of particles that could block the fuel injectors which then might interfere with engine responsiveness. By using a decent pump, you not only get better longevity out of the pump but you can save other vital parts in the fuel system to avoid future expensive repairs.
Fuel pumps have a significant impact on fuel efficiency as well. Irrespective of the cause, when fuel delivery is inconsistent or under low pressure it leads to incomplete combustion, thus prompting the engine to work harder and impacting on miles per gallon by 10-15% A high-quality fuel pump guarantees a proper air-fuel ratio for the engine, improving mileage and minimising pollutants. Although, the higher upfront cost for a quality pump can be recouped over time with fuel savings from better mileage.
High-performance or modified engines, including those employing turbochargers or superchargers are even more dependent upon fuel pump quality. Such engines require a very specific, high-pressure fueling system to forestall any lean running (more air than fuel in the combustion event), which would lead to overheating and destruction. Performance vehicles also depend on quality parts, per the gospel of automotive experts, Carroll Shelby declaring: "Horsepower sells cars [and] torque wins races." This has become yet more pronounced recently making a reliable Fuel Pump that offers top shelf quality is even more important.
The quality of the fuel pump ultimately impacts vehicle reliability and performance, meaning it is essential for drivers to select a pump which meets an exceeds OEM standards.