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Glossary

AC

Air Conditioning

2WD

Two wheel drive

4WD

Four wheel drive

ABS

Anti-lock braking system

AIR

Air injection Reactor (air pump into exhaust)

AP

Air pump

AT

Automatic transmission

AWD

All wheel drive

Batt

Battery

Bbl

Barrel

CA

California vehicle

Calf.

California vehicle

Ch

Chassis

CID

Cubic inch displacement

CNG

Compressed natural gas

CONV

Convertible

Coupe

2 door

CPI

Central port injection

CYL

Cylinder

DFI

Digital fuel injection

Dia

Diameter

DIS

Direct ignition system (distributor-less ignition)

DOHC

Dual overhead cam engine

Dr

Door or drive

DRIV

Driver

DRW

Dual rear wheel

ECT

Engine coolant temperature sensor

ECU

Electronic control unit

EEC

Electronic engine control

EFI

Electronic fuel injection

EGO

Exhaust oxygen sensor

EGR

Exhaust gas re-circulation

Eng

Engine

EOC

Engine oil cooler

EXC

Except

Fed

Federal

FF

Flex Fuel

FI

Fuel injection

FWD

Front wheel drive

Ga

Gauge

GVW

Gross vehicle weight

H/L

Headlight

HB

Hatchback

HD

Heavy duty

HEGO

Heated Exhaust Gas Oxygen sensor

Hi-Alt

High altitude

HO

High output

HP

Horsepower or high pressure or high performance

Htr

Heater

Hyd

Hydraulic

IAC

Idle air control

ID

Inside Diameter

Ign

Ignition

Incl.

Including

Inj.

Injector

ISC

Idle Speed Control

L4

4 cylinder In-line engine

L6

6 cylinder In-line engine

Lb

Pound

LD

Light duty

LH

Left Hand (Driver side)

LHD

Left hand drive

MAF

Mass air flow sensor

MAP

Manifold absolute pressure

MAT

Manifold air temperature

MB

Manual brake

MCU

Microprocessor control unit

MOT

Manual overdrive transmission

MPH

Miles per hour

MT

Manual transmission

Mtd

Mounted

Mtg

Mounting

N/R

Not required

Neg

Negative

O2

Oxygen

OD

Over Drive

OE

Original equipment

OEM

Original equipment manufacture

OHC

Over head cam (camshaft mounted in cylinder head)

OHV

Overhead valve (camshaft NOT mounted in cylinder head)

Opt.

Optional

PASS

Passenger

PB

Power Brakes

PC

Police car

PCM

Power train control module

PCV

Positive crankshaft ventilation

Pos

Positive

PS

Power Steering

PSI

Pounds per square inch

Reg.

Regulator

Req.

Required

RH

Right Hand (Passenger Side)

Rr

Rear

RWD

Rear wheel drive

S/N

Serial number

SC

Super charged or spark control

SD

Super duty

Sec.

Secondary

SED

Sedan (4 door)

SEFI

Sequential electronic fuel injection

SFI

Sequential fuel injection

SOHC

Single overhead cam engine

Sol.

Solenoid

Spd

Speed

Std.

Standard

Strg.

Steering

SW

Station wagon

SW.

Switch

Tach.

Tachometer

TBI

Throttle body injection

TC

Turbo charged

Tel

Telescopic

Temp.

Temperature

TPS

Throttle position sensor

Trk.

Truck

V

Volt

Vac.

Vacuum

VIN

Vehicle identification number

Vlv

Valve

VR

Voltage regulator

W/

With

WB

Wheel base (distance between the center of front axle to the center of the  rear axle)

Wgn

Wagon

WO/

With out

WP

Water pump