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.The emissions control systems are
designed and certif ied to work to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Honda 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.
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.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst em T hree Way Cat alyt ic Convert er Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Emissions Cont rols
Technical Inf ormation
303
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2008 Pilot
CONT INUED
...
Accessories and Modif ications .196
ACCESSORY (Ignition Key
.......................................
Position) .81
............
Accessory Power Sockets .101
...........................
AC Power Outlet .102
....................
Additives, Engine Oil .245
...............
AdvancedAirbagSystem .30
.............................
Airbag (SRS) .11,25
..........
Airbag System Components .25
..............
Air Conditioning System .106
.....................
Rear A/C Control .113
.......................
Air Pressure, Tires .264
......................................
Antif reeze .248
...............
Anti-lock Brakes (ABS) .216
...............................
Indicator .63,217
...................................
Operation .216
..............
Anti-thef t, Audio System .141
.
Anti-thef t Steering Column Lock .81
................................
Audio System .115
...
Automatic Seat Belt Tensioners .23
...
Automatic Lighting Off Feature .76
.............
Automatic Speed Control .177
..............
Automatic Transmission .206
..........................
Capacity, Fluid .294 ...............
Checking Fluid Level .250
.......................................
Shif ting .206
.
Shif t Lever Position Indicator .206
................
Shif t Lever Positions .207
....................
Shif t Lock Release .209
Battery Charging System ...........................
Indicator .62,282
............................
Jump Starting .278
..............................
Maintenance .269
............................
Specif ications .294
..............................
Bef ore Driving .187
..................................
Belts, Seat .10,21
...........................
Beverage Holders .99
..................................
Booster Seats .54
Brakes
...........
Anti-lock System (ABS) .216
.............
Break-in, New Linings .188
....................
Bulb Replacement .258
...........................................
Fluid .252
.........................................
Parking .97
.................
System Indicator .63,284
........................
Wear Indicators .215 .............................
Braking System .215
.................
Break-in, New Vehicle .188
..
Brightness Control, Instruments .76
........................
Brights, Headlights .75
Bulb Replacement
..........................
Back-up Lights .258
.....................
Brake Lights .258,259
................
Front Parking Lights .255
........
Front Side Marker Lights .255
.................................
Headlights .254
........
High-mount Brake Lights .259
.................................
Rear Bulbs .258
............................
Specif ications .295
.............
Turn Signal Light .255,258
..............................
Bulbs, Halogen .254
............................
Capacities Chart .294
.............
Carbon Monoxide Hazard .57
.............................
Carrying Cargo .198
.............
CAUTION, Explanation of .iii
..........................
CD Changer .131,134
.......................................
CD Player .130
Index
A
B
C
INDEX
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2008 Pilot
