AbbreviationDescriptionA/CLLocated in the air cleanerA/CL DVAir Cleaner Diverter ValveA/CL BI METAir Cleaner Bi-Metallic ValveA/CL CWMAir Cleaner Cold Weather ModulatorACTAir Charge Temperature Sensor, prior to 1992ACTSAir Cleaner Temperature SensorACVAir Control ValveAIRThermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.AIR BPVAIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) ValveBVBowl Vent (on top of the float tanks)CARBCarburetorCBDClosed Bowl DistributorCPRVCanister Purge ValveDISTDistributorDPFEDifferential Pressure FeedbackDV-TWTwo Way Delay ValveEFCAElectronic Fuel Control Assembly / (Fuel Pressure Regulator (FPR)EGRExhaust Gas RecirculationEGRC/EGRVEGR Vent/EGR ControlEXH HCVExhaust Heat Control ValveEVPEGR Valve PositionEGRValve PositionEVREGR Vacuum Regulator; also called EGR Vacuum SolenoidFLTRFilterFPRFuel Pressure Regulator (check vacuum line)HEAT VLV INTHeat Vacuum Control Valve Intake, (next to carb)HICVHot Idle Control ValveIATIntake Air Temperature Sensor (Air Charge Temperature (ACT), prior to 1992IVVThermactor Idle Vacuum ValveLCVEGR Load ControlMAN VACManifold vacuum-Vacuum source; usually ref. to as Vacuum Tree atop intake manifoldMAPManifold Absolute PressurePCVPositive Crankcase VentilationPURGEVapor Canister Purge ValvePVPorted VacuumPVSPorted Vacuum Switch (PVS) ValveSSpark portSA-FVSeparator Assembly Fuel/VacuumSOLVThermactor Solenoid ValveSV CBVCarborator Fuel Bowl Solenoid Vent ValveTCACThermostatically Controlled Air CleanerTCPTemperature Compensated Accelerator PumpTKThrottle KickerTVSThrottle Valve Solenoid (aka Solepot, Dashpot) OR Temperature Vacuum SwitchTVVThermal Vacuum Valve OR Thermostatic Vacuum Valve (aka Ported Vacuum Switches; Thermal Vacuum Valve)VACVacuumVCKVVacuum Check ValveVCVVacuum Control ValveVDVVacuum Delay ValveV CK V or VCVVacuum Check ValveVOTMVacuum Operated Throttle ModulatorVRDVDistributor Vacuum Delay Valve (VDV, VRDV, DV-TW)VRDVVacuum Delay Valve (VDV, VRDV, DV-TW)VRESERVacuum Reservoir (coffee can style in earlier years; replaced by plastic style)VRESV RESTon earlier years such as SEABRONC’s 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of timeVRVVacuum Regulator ValveWOTWide Open Throttle Valve