Fuel injector

How it is used

Technicians test, clean, code and replace fuel injectors; common faults are leaking, sticking or clogged injectors. Modern engines use direct injection (into the cylinder) or port injection (into the intake port).

Example sentences

1. Cylinder three misfires because its fuel injector is leaking.

2. New diesel fuel injectors must be coded to the ECU after fitting.

Common collocations

• leaking fuel injector
• clogged injector
• injector coding
• replace the fuel injectors

Related terms

• engineThe machine that burns fuel, usually petrol or diesel, to produce the power that moves a vehicle. It turns the energy of burning fuel into rotation of the crankshaft.
• cylinderOne of the round chambers in an engine block where a piston moves up and down and the fuel is burned. Most car engines have three, four or six cylinders.
• misfireA failure of the fuel and air in one or more cylinders to burn properly. The engine shakes, runs rough and loses power, and unburned fuel can overheat the catalytic converter.
• ECUShort for electronic control unit (or engine control unit): a small computer that reads sensors and controls actuators, for example injection timing in an engine. Modern cars have dozens of them.

More terms: Engine and Fuel Systems

• torque
• horsepower
• internal combustion engine
• piston
• crankshaft
• camshaft
• turbocharger
• catalytic converter
• emissions
• coolant
• fuel economy
• timing belt