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 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)
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.This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
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.
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 converters
are in the exhaust system. Through
chemical reactions, they convert HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI SystemIgnit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Three Way Catalytic Converter
Emissions Cont rols
Technical Inf ormation
433
Î
......................
Seats, Adjusting the .151
............................
Security System .233
.....
Sequential Sports Shif t Mode .315
..........................
Paddle Shif ters .315
...............................
Serial Number .424
...........................
Service Intervals .349
......
Service Manual, Purchasing . 441
.........
Service Station Procedures . 297
........................................
SH-AWD .320
..
Torque Distribution Monitor . 320
.......................................
Indicator .67
...
Shif t Lever Position Indicators . 313
........................
Shif t Lock Release .318
..............................
Side Airbags .11, 32
How the Side Airbag of f ......................
Indicator Works .35
...
How Your Side Airbags Work . 32
................
Side Curtain Airbags . 11,34
How Your Side Curtain ..........................
Airbags Work .34
Side Marker Lights, Bulb .........................
Replacement in .375
.............................
Signaling Turns .136
.....................................
Snow Tires .387
................................
Sound System .203 Spare Tire
......................................
Inf lating .397
............................
Specif ications .427
....................
Specif ications Charts . 426
................................
Speed Limiter .318
.......................................
Spotlights .192
..........
SRS, Additional Inf ormation . 26
...
Additional Safety Precautions . 37
..
How the SRS Indicator Works . 34
How Your Airbags ............................
Work .29, 32,34
........................
SRS Components .26
..................................
SRS Service .36
.............................
SRS Indicator .34 ,63
START (Ignition Switch .....................................
Position) .147
.......................
Starting the Engine .311
...................
Auto Control Mode . 311
In Cold Weather at High ..................................
Altitude .311
................
With a Dead Battery . 403
..............
State Emissions Testing . 435
........
Steam Coming f rom Engine . 406
Steering Wheel ..............................
Adjustments .143
...........
Anti-thef t Column Lock . 147......................
Position Memory .156
Steering Wheel Buttons/ .....................................
Switches .230
...................
Stereo Sound System . 203
....................
Storing Your Vehicle .392
......................................
Sun Visors .188
Supplemental Restraint ................................
System .11, 26
......................................
Servicing .36
.........................
SRS Indicator .34 ,63
...................
System Components . 26
..................................
Synthetic Oil .363
.
Taking Care of the Unexpected . 393
Technical Descriptions ......
DOT Tire Quality Grading . 428
.....
Emissions Control Systems . 432
Three Way Catalytic .............................
Converters .434
.......................
Temperature Gauge .70
........
Temperature, Inside Sensor . 202
....................
Temperature, Outside . 73
..............
Tether Anchorage Points . 51
Index
T
VIII
