What is the difference between PGM-FI and I-FI?

1 Answers
MacBentley
07/29/25 11:05pm
I-FI fuel injection system is a domestic fuel injection system, while the PGM system is independently developed by Honda. Fuel efficiency: I-FI is inferior to PGM-FI in terms of fuel consumption and fuel efficiency. I-FI vehicles previously experienced issues such as runaway engines and cylinder head problems. Fuel injection method: I-FI is a closed-loop fuel injection system, including the e-FI fuel injection, which is also closed-loop. The production cost difference is one-third to half. Currently, PGM-FI, DCP-FI, Siemens, Magneti Marelli, and Delphi are better. Functional aspects: PGM can atomize the fuel delivered by the built-in electronic fuel pump in the fuel tank to the optimal state based on specific exhaust conditions, engine speed, and internal oil temperature. After adjusting the air-fuel ratio, it injects the fuel into the cylinder to achieve the best combustion state. PGM-FI improves the engine's fuel economy by approximately 15% compared to conventional carburetor models of the same displacement, while also enhancing power performance.
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