Blossary – electronic fuel injection (EFI)

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electronic fuel injection (EFI)

A modern, efficient method of fuel delivery that replaced carburetors in all Ford passenger cars and light trucks with gasoline engines

EFI precisely controls the amount of fuel used and improves the dispersion of fuel in the air charge, improving drive ability, fuel economy and performance of the engine

Variations of EFI used in Ford vehicles include: Multi-port Electronic Fuel Injection (MEFI)Also known as “direct port” injection, MEFI uses individual port-mounted injectors to deliver fuel directly to the intake inlet for each cylinder. This more even distribution of fuel improves power balance between the cylinders, maximizes combustion efficiency and improves drive ability and performance. The system “squirts” fuel into each cylinder with every revolution of the crankshaft. Sequential Multi-port Electronic Fuel Injection (SEFI)Specific type of multi-port injection that delivers fuel in more precisely timed pulses corresponding to the opening of each intake valve, SEFI takes advantage of the atomized fuel spray from the injectors to achieve a more precise combustion for better performance, often with improved fuel economy.