Some useful acronyms

**Admin** Thu Nov 12, 2009 5:27 pm

4WD - Four Wheel Drive

ABS - Anti-lock Braking System
AFC - Active Fuel Controller, see 'S-AFC' below
AFR - Air to Fuel Ratio
ASC - Active Stability Control
ATF - Automatic Transmission Fluid
AVC-R - model of boost controller
AWD - All Wheel Drive
AYC - Active Yaw Control

BOV - Blow Off Valve

CAI - Cold Air Intake
CAPS - Computerized Automatic Parts Search. Mitsubishi Japan's parts search database software. See here
CVR4 - Club VR4

DOHC - Double Overhead Cam

EBC - Electronic Boost Controller
ECU - Electronic Control Unit (sometimes incorrectly referred to as Engine Control Unit, but you can have ECU's for other components such as the automatic transmission)
EFI - Electronic Fuel Injection
EGT - Exhaust Gas Temperature
EIDS - (Electronic Idle Stabilizer) by HKS. This will correct stalling issues connected to VTA blow off valves
E-Manage - Piggyback engine ECU
EMU - E-Manage Ultimate

FMIC - Front Mounted InterCooler
FPR - Fuel Pressure Regulator
FWD - Front Wheel Drive

G TECH - Little in-car black box to measure 0-60 times

IAT - Internal Air Temperature
INVECS (II) - Intelligent and Innovative Vehicle Electronic Control System. See here.

LC-1 - Wideband Controller Standalone Unit
LM-1 - Wideband O2 Digital Air/fuel Ratio Meter
LSD - Limited Slip Differential

MAF - Mass Air Flow
MAP - Manifold Absolute Pressure
MAS - Mass Airflow Sensor (usually MAF Sensor)
MBC - Manual Boost Controller
MMCS - Mitsubishi Multi Communication System - see here.
MUT-II - Mitsubishi Universal Tester 2 (second generation) fault code analysis tool

NOS - Holley branded Nitrous Oxide (N2O) system

RSM - Rev/Speed Meter - It's like the GTECH, but much better. Made by Apex'i

S-AFC - Super Active Fuel Controller. Made by Apex'i, this device allows the user to tweak the car's fueling. AFC-Neo is the latest version.
SOHC - Single Overhead Cam

TCL - Traction Control Limiter
TT - Twin Turbo or Turbo Timer
TPS - Throttle Position Sensor (or Signal)

VR4 - Victory Road AWD (4WD, but it's not an off-road 4WD, so AWD is more applicable) ... No, you really didn't want to know this.
VTA - Vent To Atmosphere (type of Blow-off Valve, as opposed to recirculating)

WOT - Wide Open Throttle