Honda Accord 4D 2003-2006, Owner'S Manual, Page: 510 / 525

The PGM-FI System uses sequential
multiport fuel injection.
It has three subsystems: Air Intake,
Engine Control, and Fuel Control.
The Engine Control Module (ECM)/
Powertrain Control Module (PCM-
A/T only) uses various sensors to
determine how much air is going
into the engine. It then controls how
much fuel to inject under all
operating conditions.
This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), dinitrogen
(N ), and water vapor.
The Exhaust Gas Recirculation
(EGR) system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding exhaust
gas to the air/fuel mixture reduces
the amount of NOx produced when
the fuel is burned.
2
2
PGM-FI System
Ignition Timing Control System
Three Way Catalytic Converter Exhaust Gas Recirculation (EGR)
System
Technical Inf ormation
Emissions Controls (Petrol models)
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