Emission Controls
Exhaust Emission Controls
The exhaust emission controls
include three systems: PGM-FI,
Ignition Timing Control and
Catalytic Converter. These four
systems work together to control
the engine's combustion and
minimize the amount of HC, CO,
and NOx that comes out the
tailpipe. The exhaust emission
control systems are separate from
the crankcase and evaporative
emission control systems.
PGM-FI System
The PGM-FI System on your car
has three sub systems: Air Intake,
Electronic Control, and Fuel
Control. The Electronic Control
Unit (ECU) 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.
Ignition Timing Control System
This system constantly adjusts the
ignition timing, reducing the
amount of HC, CO and NOx
produced.
Catalytic Converter
The 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
2
), dinitrogen
(N
2
), and water vapor.
Replacement Parts
The emission control systems are
designed and certified to work to-
gether in reducing emissions to
levels that comply with the Clean
Air Act. To make sure the emis-
sions remain low, you should use
only new genuine Honda replace-
ment parts or their equivalent for
repairs. Using lower quality parts
may increase the emissions from
your car.
The emissions control systems are
covered by warranties separate
from the rest of your car. Read
your warranty manual for more
information.
Technical Information
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