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
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
Emissions Cont rols
Technical Inf ormation
353
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ÎTechnical Descriptions....
DOT Tire Quality Grading .346
.....
Emissions Control Systems .352
Three Way Catalytic
...............................
Converter .354
.......................
Temperature Gauge .65
....................
Temperature, Outside .71
........
Temperature, Inside Sensor .132
..............
Tether Anchorage Points .46
..
Three Way Catalytic Converter .354
..................
Tilt the Steering Wheel .91
..........................
Time, Setting the .116
....................................
Tire Chains .312
.........
Tire, How to Change a Flat .319
Tire Pressure Monitoring
....................................
System .272
Low Tire Pressure/TPMS
...........................
Indicator .64,272
..............
TPMS System Failure .275
Tire Pressure Monitoring System ...................................
Messages .273
...............................................
Tires .306
..............................
Air Pressure .306
.........................
Checking Wear .309
..........................
Compact Spare .318
......
DOT Tire Quality Grading .346 ......................................
Inf lation .306
..................................
Inspection .309
...................................
Replacing .311
......................................
Rotating .310
...........................................
Snow .312
............................
Specif ications .345
.............................
Summer Tire .312
.......................
Traction Devices .312
..........................
Winter Driving .312
...................
Tools, Tire Changing .319
Towing
.....................................
A Trailer .276
................
Emergency Wrecker .337
...........................
Traction Devices .312
Transmission
Checking Fluid Level, ..............................
Automatic .292
.
Checking Fluid Level Manual .294
..................
Fluid Selection .292,294
..............
Identif ication Number .342
.............
Shif ting the Automatic .259
..................
Shif ting the Manual .256
.....................................
Treadwear .346
................................
Trip Computer .73
.......................................
Trip Meter .70 ................................................
Trunk .97
........
Emergency Trunk Release .98
.................................
Opening the .97
...................
Open Monitor Light .68
....................................
Turn Signals .86
Unexpected, Taking Care
..........................................
of the .317
....
Unif orm Tire Quality Grading .346
........................
Unleaded Gasoline .236
.......
Used Oil, How to Dispose of .289
.................
Vehicle Capacity Load .248
......................
Vehicle Dimensions .344
....
Vehicle Identif ication Number .342
Vehicle Stability Assist (VSA)
....................................
System .270
........
VSA System Indicator .61,270
...
VSA Activation Indicator .61,270
.........................
VSA Of f Switch .271
.............................
Vehicle Storage .315
.................................................
VIN .342
Index
U
V
VIII
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