Electronic Fuel Injection replaces mechanical carburetors by using a computer to calculate and deliver the precise amount of fuel needed for combustion. The system reads sensors for air mass, temperature, and throttle position, then pulses electromagnetic injectors to spray atomized fuel into the intake manifold or directly into the cylinders.
We need to check the fuel pressure before we condemn the EFI relay.
Also heard as
- electronic fuel injection
Related terms
ECU
The primary computer that manages engine performance, fuel delivery and emissions.
Throttle body
A housing containing a pivoting valve that controls the amount of air entering a fuel-injected engine.
GDI
Gasoline Direct Injection is a fuel delivery system that sprays gasoline directly into the combustion chamber.
TBI
Throttle body injection is an early electronic fuel delivery system that sprays fuel centrally before the intake manifold.
PFI
This fuel delivery design positions the injectors just upstream of the intake valves.