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Thread: EFI Acronyms and Abbreviations

  1. #1
    EFI GearHead ! EagleMark's Avatar
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    EFI Acronyms and Abbreviations

    EFI Acronyms and Abbreviations
    #/Hr - Pounds per Hour or PPH
    ABS - Anti-lock Braking System
    A/C - Air Conditioning
    AE - Acceleration Enrichment
    AFPR - Adjustable Fuel Pressure Regulator
    AFR - Air Fuel Ratio
    ATDC - After Top Dead Center
    ALDL - Assembly Line Diagnostic Link
    BARO - Barometric Pressure
    BBL - Barrel
    BCM - Body Control Module
    BDC - Bottom Dead Center
    BIN - Binary
    BLM - Block Learn Multiplier
    BSFC - Brake Specific Fuel Consumption
    BPC - Base Pulse Constant
    BPW - Base Pulse Width
    BTDC - Before Top Dead Center
    CAT - Catalytic Converter
    CCI - Computer Controlled Ignition
    CCP - Charcoal Cannister Purge
    CDI - Capacitive Discharge Ignition
    CEL - Check Engine Light
    CFI - Cross-Fire Injection
    CLT - Closed Loop Term
    CNP - Coil Near Plug
    CTS - Coolant Temperature Sensor
    DC - Duty Cycle
    DE - Deceleration Enleanment
    DFCO - Decel Fuel Cut Off
    DIS - Distributorless Ignition System
    DRP - Distributor Reference Pulse

    EAC Valve An abbreviation for Electric air control valve. This is the GM version of a diverter air gulp valve, providing three functions in a single valve
    •the normal diverter valve function, i.e., it diverts air on rapid increase in manifold vacuum;
    •it relieves pressure by diverting air to the air cleaner when the air injection system pressure exceeds a certain set level;
    •being solenoid-controlled, it allows air to be diverted under any desired operating mode.

    ECM - Engine Control Module
    ECT - Engine Coolant Temperature
    EGR - Exhaust Gas Recirculation
    EGT - Exhaust Gas Temperature
    EPROM - Eraseable Programmable Read-only Memory
    ESC - Electronic Spark Control, knock detection & retard
    EST - Electronic Spark Timing, SA control
    FAR - Fuel Air Ratio
    FPR - Fuel Pressure Regulator
    Ft/Lb - Foot Pounds
    GPS - Grams Per Second
    Gms/Sec - Grams per Second
    HEI - High Energy Ignition
    HP - Horse Power
    IAC - Idle Air Control
    IAT - Intake Air Temperature
    INT - Integrator
    Km - KiloMeters
    Km/L - Kilometers per Litre
    KPa - KiloPascals
    KPH - Kilometers Per Hour
    LM - Launch Mode
    LSA - Lobe Separation Angle
    MAF - Mass Air Flow
    MAP - Manifold Absolute Pressure
    MAT - Manifold Air Temperature
    MPG - Miles Per Gallon
    MPH - Miles Per Hour
    MPFI - Multi Port Fuel Injection
    NB - Narrow Band O2 sensor
    O2 - Oxygen Sensor
    P/S - Power Steering
    PCM - Powertrain Control Module
    PCV - Positive Crankcase Ventilation
    PE - Power Enrichment
    PPH - Pounds Per Hour
    PROM - Programmable Read-only Memory
    PSI - Pounds per Square Inch
    PW - Pulse Width
    PWM - Pulse Width Modulation
    RPM - Revolutions Per Minute
    SA - Spark Advance
    SD - Speed Density
    SES - Service Engine Soon
    TACH - Tachometer
    TBI - Throttle Body Injection
    TCC - Torque Converter Clutch
    TCM - Transmission Control Module
    TDC - Top Dead Center
    TF - Throttle Follower
    TPS - Throttle Position Sensor
    TSA - total spark advance
    VAC - Vacuum
    VAFPR - Vacuum Adjusted Fuel Pressure Regulator
    VATS - Vehicle Anti-theft System
    VE - Volumetric Efficiency
    VRFPR - Vacuum Referenced Fuel Pressure Regulator
    VSS - Vehicle Speed Sensor
    WB - Wide Band O2 sensor
    WOT - Wide Open Throttle

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  2. #2
    Carb and Points!
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    Re: EFI Acronyms and Abbreviations

    This is great for a newb like me. Thanks!

  3. #3
    EFI GearHead ! EagleMark's Avatar
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    Re: EFI Acronyms and Abbreviations

    There's a lot more when you get into OBDII stuff. This is all I knew off top of my head...

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #4
    Carb and Points!
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    Re: EFI Acronyms and Abbreviations

    Thank you sir. I was contemplating making my own list to keep all of these straight.
    Jason Honeycutt
    1978 IH Scout II
    1976/78 IH Terra
    G R C built
    S E B A
    www.youtube.com/jhnyct

  5. #5
    EFI GearHead ! EagleMark's Avatar
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    Re: EFI Acronyms and Abbreviations

    If anyone knows one not listed just post them up and I will edit the list.

    Lots of this stuff that is coming together here in the forums I will turn into HTML pages for future reference and the search engines find HTML pages easier than php or cgi or any kind of forum type data base driven information.

    We have all summer though... I spend more time inside doing these projects in winter! Gives me something to do while staying warm!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  6. #6
    Electronic Ignition!
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    Thanks for this great information.. Love this Site!!!
    83 CJ7 : w/350 TBI engine, TH350 Trans (non-electronic), Dana 300 Transfer Case, 4.5 Suspension lift, 2 body one 35" Tires.

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