Home Auto Repair Leaky Fuel Injector Symptoms

Leaky Fuel Injector Symptoms


A vehicle’s fuel injection system is responsible for injecting fuel (gasoline) into the engine cylinders, where the gas is burned to produce engine power. A leaky fuel injector, which is a common fuel injection system problem, can significantly compromise engine performance and produce a variety of symptoms.

Visible Fuel Leak

Often, a leaky fuel injector leaks enough fuel to produce a puddle of fuel near the fuel injector nozzle housing or on the intake manifold, both of which can be easily spotted.

Rough Engine Idle

A fuel injector leak can disrupt the normal flow of fuel into a vehicle’s engine cylinders, which can cause improper or incomplete engine combustion. When this happens, a rough or erratic engine idle can be the result.