Fuel pump is one of the most important components in a vehicle’s fuel delivery system. If it is doing well, fuel delivery system functions normally. But, once it fails, the car engine ceases to run. However, the failure and the inconvenience it causes can be prevented by identifying the early warning signs.In this article, we will discuss the common causes of fuel pump failure and its warning signs.Causes of failure: There are more than a couple of causes for its failure. They are as follows: Broken wiring: Broken or faulty wiring in the vehicle’s fuel system prevents the current flow to the fuel pump from the relay. Even the corroded, loose, melted or burnt wires/connectors, and poor electrical grounding can restrict the current or voltage flow from the relay to the fuel pump, thus, affecting its functioning – pumping fuel to the engine. Watch video in link below
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Problems in the fuel tank: Presence of dust/debris, rust or dirty fuel in tank can result in its malfunctioning. During cool and humid weather, when the tank is low, it gets moist leading to the oxidation of the tank and formation of rust. As it is located inside the tank, the rust will be ingested in to the fuel pump, bringing about its failure.Clogged fuel filter: Usage of dirty fuel or presence of contaminants in the tank can clog the pickup strainer or filters present in the fuel lines. This results in low pressure and low peak flow of fuel that weaken its functioning.Clogged filters are generally associated with damaged fuel line connectors/splits or cracked hoses or kinked fuel lines that lead to leakage of fuel. These cracks or leaks on the fuel lines can create vacuum leaks, which disturb the air-fuel ratio, thus, making the engine run lean.