Programmed fuel injection

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Programmed Fuel Injection, or PGMFI/PGM-FI, is the name given by Honda to a proprietary digital electronic fuel injection system for internal combustion engines with port injection. It is available since the early 1980s; this system has been implemented on motorcycles, automobiles, and outboard motors.


With its origins beginning with the CX500 and CX650 turbocharged motorcycles in 1982 and 1983, respectively, Honda's PGM-FI made its way into their automobiles in the early 1980s with the ER engine equipped City Turbo; the system gained popularity in the late 1980s in their Accord and Prelude models with A20A, A20A3 & A20A4 engines (Honda A engine), and its motorcycles later on. In 1998, Honda built its third motorcycle with fuel injection; the VFR800FI.


The PGM-FI system relies on a piezoelectric sensor to indirectly measure the air quantity, and interprets the data using performance maps. Fuel is injected intermittently into the inlet ports; the PGM-FI also has a trailing throttle fuel cutoff and a self-diagnosis system.[1]


  1. ^ Olaf von Fersen (ed.): EIN JAHRHUNDERT AUTOMOBILTECHNIK • PERSONENWAGEN, VDI-Verlag, Düsseldorf 1986, ISBN 978-3-642-95773-4. p. 263-264

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