Exhaust
Emission
Control
System
The
exhaust emission control system includes
the following components that should not need
adjustment,
al
though
periodic inspection
by
your Honda dealer
is
recommended.
I
PGM-FI
System
The
PGM-FI
(programmed fuel injection) system
uses
sequential multiport fuel injection, and
is
comprised
of
air intake, engine control, fuel
control,
and exhaust control subsystems.
The engi
ne
control module (ECM)
uses
sensors
to
determine
how
much air enters the engine,
and then
controls
how
much fuel
to
inject.
I
Ignition
Timing
Control
System
.
Th
e ignition timing control system adjusts the
ignition timing
to
reduce the amount
of
H
C,
CO,
and
NOx
produced.
Emission Control Systems
I
Secondary
Air
Injection
System
The secondary air injection system adds filtered
air into the exhaust
gas
to
help improve
emission
control performance.
I
Catalytic
Converters
The
exhaust system contains one
or
more
catalytic converters. Catalytic converters
use
a
catalyst
to
convert most
of
the harmful exhaust
gas
compounds into harmless compounds.
Evaporative
Emission
Control
System
50 STATE (meets California)
An evaporative emissions control system
uses
a
canister
filled with
cha
rcoal
to
absorb fuel vapor
from the
fuel tank
whi
le the eng
in
e
is
off.
Th
e
vapor
is
drawn into the engine and burned
w hile riding.
•
continued 109
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