The exhaust emissions controls
include f our systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These f our systems work
together to control the engine’s
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.The emissions control systems are
designed and certif ied to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.
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 ), nitrogen
(N ), and water vapor. The exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manif old. Adding exhaust gas to the
air/f uel mixture reduces the amount
of NOx produced when the f uel is
burned. This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The PGM-FI system uses sequential
multiport f uel injection.
It has three subsystems: air intake,
engine control, and f uel control. The
powertrain control module (PCM) in
automatic transmission vehicles or
the engine control module (ECM) in
manual transmission vehicles uses
various sensors to determine how
much air is going into the engine. It then controls how much f uel to inject
under all operating conditions.
2
2
Emissions Cont rols
Exhaust Emissions Controls Replacement Parts
PGM-FI System
Three Way Catalytic Converter
Exhaust Gas Recirculat ion (EGR)
Syst em
Ignit ion T iming Cont rol Syst em
Technical Inf ormation
275
CONT INUED
...
Accessories and Modif ications .181
................................
Accessories .181
............................
Modif ications .182
ACCESSORY (Ignition Key .......................................
Position) .90
............
Accessory Power Sockets .115
................
Adding Engine Coolant .221
........................
Adding Engine Oil .218
....................
Additives, Engine Oil .219
.............................
Airbag (SRS) .11,23
...............
Additional Information .23
......................................
Servicing .32
...................
System Components .23
..............
Air Conditioning System .122
.......................
Air Pressure, Tires .234
......................................
Antif reeze .221
Anti-lock Brakes (ABS) ...............................
Indicator .61,201
...................................
Operation .201
..............
Anti-thef t, Audio System .151
.
Anti-thef t Steering Column Lock .90
................................
Audio System .127
...
Automatic Lighting Off Feature .86
...
Automatic Seat Belt Tensioners .21 .............
Automatic Speed Control .153
..............
Automatic Transmission .193
..........................
Capacity, Fluid .270
...............
Checking Fluid Level .223
.......................................
Shif ting .193
.
Shif t Lever Position Indicator .193
.......................................
Shif ting .193
....................
Shif t Lock Release .197
Battery Charging System ...........................
Indicator .60,256
............................
Jump Starting .252
..............................
Maintenance .240
............................
Specif ications .271
..............................
Bef ore Driving .175
..................................
Belts, Seat .10,20
...........................
Beverage Holder .115
Brakes ...........
Anti-lock System (ABS) .201
.............
Break-in, New Linings .176
...........................................
Fluid .225
.......................................
Parking .112
.................
System Indicator .60,258 ........................
Wear Indicators .200
.............................
Braking System .200
.................
Break-in, New Vehicle .176
..
Brightness Control, Instruments .85
........................
Brights, Headlights .84
Bulb Replacement ..........................
Back-up Lights .230
.................................
Fog Lights .227
............................
Specif ications .271
............
Turn Signal Lights .228,229
..............................
Bulbs, Halogen .227
............................
Capacities Chart .270
.............
Carbon Monoxide Hazard .53
............................
Carrying, Cargo .183
Cassette Player ............................................
Care .149
...................................
Operation .147
..............
CAUTION, Explanation of .ii
..................................
Ceiling Light .113
........................
Certif ication Label .268
...................................
Chains, tires .239
Index
A
BC
INDEX
I
