air condition HONDA PRELUDE 1998 Owner's Manual

Emissions Controls

The burning of gasoline in your vehicle's engine produces several by-products. Some of these are carbon
monoxide (CO), oxides of nitrogen (NOx) and hydrocarbons (HC).
Gasoline evaporating from the tank
also produces hydrocarbons. Con-
trolling the production of NOx, CO, and HC is important to the environ-
ment. Under certain conditions of sunlight and climate, NOx and HC
react to form photochemical "smog." Carbon monoxide does not contri-
bute to smog creation, but it is a
poisonous gas. The Clean Air Act
The United States Clean Air Act* sets standards for automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
work and what to do to maintain them. This section summarizes how
the emissions controls work.Scheduled maintenance is on page 164.
* In Canada, Honda vehicles comply
with the Canadian Motor Vehicle Safety Standards (CMVSS) forEmissions valid at the time they are
manufactured. Crankcase Emissions Control
System
Your vehicle has a Positive Crankcase Ventilation System. This
keeps gasses that build up in the engine's crankcase from going into
the atmosphere. The Positive Crank- case Ventilation valve routes them
from the crankcase back to the intake manifold. They are thendrawn into the engine and burned.
Evaporative Emissions Control
System
As gasoline evaporates in the fuel tank, an evaporative emissions
control canister filled with charcoaladsorbs the vapor. It is stored in this
canister while the engine is off. After
the engine is started and warmed up,
the vapor is drawn into the engine and burned during driving.

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Emissions Controls

Exhaust Emissions Controls
The exhaust emissions controls include four systems: PGM-FI,
Ignition Timing Control, ExhaustGas Recirculation and Three Way
Catalytic Converter. These four
systems work together to control the
engine's combustion and minimize
the amount of HC, CO, and NOx that comes out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.

PGM-FI System

The PGM-FI System uses sequential multiport fuel injection.
It has three subsystems: Air Intake,
Engine Control, and Fuel Control.
The Engine Control Module (ECM) uses various sensors to determine
how much air is going into the engine. It then controls how much
fuel to inject under all operating conditions. Ignition Timing Control System
This system constantly adjusts the ignition timing, reducing the amount
of HC, CO and NOx produced.
Exhaust Gas Recirculation (EGR)
System

The Exhaust Gas Recirculation (EGR) system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding exhaust
gas to the air/fuel mixture reduces the amount of NOx produced when
the fuel is burned.
Three Way Catalytic Converter
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 (C02), dinitrogen
(
N2), and water vapor.

Replacement Parts

The emissions control systems are designed and certified 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 newGenuine Honda replacement parts or
their equivalent for repairs. Using
lower quality parts may increase the emissions from 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.

Technical Information
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Index
Accessories and Modifications.... 126 Accessories................................. 126
Additional Safety Precautions.. 127Modifications............................. 127
ACCESSORY (Ignition Key Position)........................................ 71
Accessory Power Socket................ 88
Active Torque Transfer System
(ATTS)
Indicator................................ 54, 149
Operation.................................... 149
Adding Automatic Transmission
Fluid........................................ 183
Brake Fluid................................. 185
Clutch Fluid................................ 186
Engine Coolant........................... 177
Engine Oil...................................173
Manual Transmission Fluid ..... 184
Power Steering Fluid................. 186
Windshield Washer Fluid......... 182
Additional Information About Your Seat Belts........................ 40
Lap/Shoulder Belt....................... 40
Seat Belt Maintenance................ 42

Seat Belt System Components... 40

Additional Information About

YourSRS................................... 43

Additional Safety Precautions.... 46
How Your Airbags Work............ 43

How Your SRS Indicator Light
Works........................................45

SRS Components......................... 43

Additives, Engine Oil..................... 174

Adjustments
Headlights.................................. 205

Head Restraints........................... 77
Mirrors..........................................
83

Seats.............................................. 7 5

Steerin
g Wheel............................ 64

Airbag (SRS).................................... 43

Air Cleaner Element...................... 187
Air Conditioning............................... 92 Maintenance............................... 195

Usage.............................................92

Air Outlets (Vents).......................... 94
Air Pressure, Tires........................ 197 High Speed Driving................... 257
Normal Driving.......................... 198
Alcohol in Gasoline........................ 259 Antifreeze....................................... 177
Anti-lock Brakes (ABS) Indicator Eight..................... 54, 148Operation.................................... 146
Anti-theft Steering Column

Lock............................................... 71

Appearance Care........................... 219 Ashtrays (Optional)......................... 89
Audio System................................. 100
Automatic Speed Control................ 65
Automatic Transmission............... 136
Capacity, Fluid........................... 254
Checking Fluid Level................ 183
Sequential SportShift Mode..... 139
Shifting........................................ 137
Shift Lever Position Indicator.. 136
Shift Lever Positions................. 137
Shift Lock Release..................... 143
CONTINUEDProCarManuals.comMain Menu s t

Index

Battery Charging SystemIndicator............................ 53, 241
Jump Starting............................. 236 Maintenance............................... 190
Specifications............................. 255
Before Driving............................... 119
Belts, Seat........................................... 4
Beverage Holder.............................. 86
Body Repair.................................... 225

Brakes
Anti-lock System (ABS)............ 146
Break-in, New Linings .............. 120

Fluid............................................ 185
Light, Burned-out...................... 211

Parking.......................................... 84

System Indicator.......................... 53
Wear Indicators......................... 145
Brakes, ABS Operation.................................... 146
System Indicator................. 54, 148
Braking System.............................. 145
Break-in, New Car......................... 120
Brightness Control, Instruments... 61 Brights, Headlights......................... 60
Bulb Replacement
Back-up Lights........................... 211
Brake Lights............................... 211
Ceiling Lights............................. 215Courtesy Lights......................... 215
Front Parking Lights................. 208
Front Side Marker Lights......... 209
Headlights.................................. 206
High-mount Brake Light.......... 213
License Plate Light.................... 214
Rear Side Marker Lights.......... 211
Specifications............................. 255
Trunk Light................................ 216 Turn Signal Lights..................... 210
Bulbs, Halogen............................... 206
Cables, Jump Starting With.......... 236
Capacities Chart............................. 254

Carbon Monoxide Hazard.............. 47
Cargo, Loading...............................
128

Cassette Playe r

Care.............................................
116

Operation....................................

113

CAUTION, Explanatio n
of...............

ii

CD Changer...................................
.
109
CD Player........................................ 109

Certification Label......................... 252

Chains............................................. 202

Change Oil How to.........................................175

When to....................................... 164

Changing a Flat Tire ..................... 229
Changing Engine Coolant............. 179
Charging System Indicator .... 53, 241 Checking Automatic Transmission

Fluid........................................ 183

Battery Condition...................... 190

Brake Fluid................................. 185
Clutch Fluid................................186
Drive Belts.................................. 196
Engine Coolant........................... 124

Engine Oil................................... 123

Fuses........................................... 246
Manual Transmission Fluid ..... 184
Power Steering Fluid................. 186
Checklist, Before Driving............. 132
Child Safety......................................19
Cleaner, Air.................................... 187ProCarManuals.comMain Menu s t