The noise of the fuel pump might indicate several issues, and, in general terms, it focuses on electrical problems or issues within the pressure regulation system. The most common reason behind such a noise would be a malfunctioning fuel pump relay. Largely a switch-like affair, the relay’s function is to conduct current towards the fuel pump once the ignition is activated. It can begin to spur the fuel pump to operate on and off constantly if it is faulty or has intermittent contact, which can promote a clicking noise. A relay life’s expectancy is a little over 100,000 miles; however its life span seems to be shortened by heat, moisture, and electrical wear.
The other likely cause is a low fuel pressure within the system, often due to a clogged fuel filter. In the case of an obstructed filter, it would be pretty hard for the fuel pump to deliver its rated flow rate, usually around 90 to 130 LPH in average vehicles. This could result in a rhythmic audible clicking of the cycling of the pump, usually controlled by low fuel pressure. This is because the mechanics recommend changing the filter every 30,000 to 50,000 miles to avoid blockage issues that may very well affect the performance of the pump.
Faulty wiring or poor connections can also be another culprit for this problem. In cases of loose or corroded wiring, electrical resistance is increased, thus leading to surges in the power delivery to the fuel pump. Such inconsistency makes the pump click due to repeated on-and-off-phase powering of the pump. In high-mileage vehicles, the wiring tends to deteriorate due to constant exposure to heat from the engine and other environmental elements. Most mechanics would check wiring in cases of persistent clicking-particularly for those with mileage exceeding 100,000 miles-to ensure there are no electrical system faults.
It is this clicking that can occur with fuel pumps that are worn or older, whereby efficiency may be lost. In that respect, a pump internally breaks down-such as impeller and motor internal parts-loses some of the ability to hold a steady pressure. Replacing the fuel pump is then what took care of the clicking noise and gave them back a fuel delivery that would mean no future huge problems with the performance of the engine.
Automotive guru Lee Iacocca once said, “In the end, all business operations can be reduced to three words: people, product, and profits.” Addressing a clicking Fuel Pump promptly saves the dependability of the product and prevents expensive repairs. Contact Fuel Pump for your reliable fuel pump service needs.