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Ford Emissions Vacuum System Abbreviations and descriptions
Abbreviation Definition
A/CL Air cleaner located in
A/CL BI MET Air Cleaner BiMetallic valve
A/CL CWM Air Cleaner Cold Weather Modulator
A/CL CWM Air Cleaner Cold Weather Modulator
A/CL DV Air Cleaner Delay Valve
A/CL DV Air Cleaner Diverter Valve
A/CL DV Air Cleaner Diverter Valve
A/CL DV Air Cleaner Delay Valve
A/CLBI MET Air Cleaner Bi-Metallic Valve
A/CLCWM Air Cleaner Cold Weather Modulator
ACV Air Control Valve
ACV air control valve
AIR Ford calls this the Thermactor, short for Thermal Reactor. CA vehicles are installed with it as standard. Air Injection Reaction is what it stands for.
AIR BPV Air Bypass Valve (aka Thermactor Air Bypass
AIR BPV Air Bypass Valve (aka Thermactor Air Bypass)
AIR BPV Air Bypass Valve (aka Thermactor Air Bypass
AIR BPV Air Bypass Valve (aka Thermactor Air Bypass
AIR BPV AIR Bypass (AIRB) Valve, also called the Thermactor Air Bypass) Valve
BV Bowl Vent (on top of the float tanks)
BV Port Bowl Vent Port
CARB Carburetor
CAT catalytic converter
CAT catalytic converter
CPRV Canister Purge Valve
CPRV Canister Purge Solenoid Valve/ Canister Purge Solenoid (CANP)
CPRV canister purge valve.
DIST Distributor
DRCV Distributor Retard Control valve
E Port EGR Port
EFCA
EGR Exhaust Gas Recirculator
EGRV Exhaust Gas Re-circulation Valve
ENG engine
EVR EGR Vacuum Regulator
EXH HCV Exhaust Heat Control Valve
FLTR Filter
FPR fuel pressure regulator
Fuel t Fuel Tank
FV Filtered Vent
GRL grill
HEAT VLV INT Heat Valve Intake
HEAT VLV INT Heat Vacuum Control Valve Intake, (next to carb)
HICV
HICV
int man Intake Manifold?
IVV Thermactor Idle Vacuum Valve
LCV
MAN VAC Indicating Manifold vacuum-Vacuum source
MAN VAC Manifold Vacuum
MAP Manifold Absolute Pressure
PCV Positive Crankcase Ventilation Valve
PURGE CV Vapor Canister Purge Valve
Purge CV Purge Control Valve
PVS Ported Vacuum Switch
S Port Spark Port
SA-FV Spark Advance Filter Vent
SDV Spark Delay Valve
SOL V Thermactor Air Diverter (TAD) Solenoid (SOL V) (AIRD) & Thermactor Air Bypass (TAB) Solenoid
SOLV solenoid valve
SV CBV Solenoid Valve Carburetor Bowl Vent
TK Throttle Kicker
TVS Throttle Valve Solenoid (aka Solepot, Dashpot)
TVV Thermostatic Vacuum Valve (aka Ported Vacuum Switches)
TVV Thermal Vacuum Valve
V CK V Vacuum Check Valve
V REST on later years is Vapor Valve (Roll-Over @ Gas tank)
V REST on earlier years such as 78/79 & SEABRONC's 83 is a Vacuum Restrictor/Delay Valve, it restricts vacuum for a certain amount of time, on most engines a vacuum line from the carburetor base runs to a T & then to V REST to the distributor; Carbon Can is Carbon Canister (Charcoal Canister, Vapor Canister, Evaporative Emission (EVAP) Canister)
VAC Vacuum
VCKV vacuum check valve
VCV Vacuum Control Valve
VDV Vacuum Delay Valve
VR/S Vacuum Retard Solenoid
VRDV Distributor Retard Delay Valve
VRDV Vacuum Retard delay valve
VRDV Distributor Vacuum Retard Delay Valve
VRESER vacuum reservoir
VRESER Vacuum Reservoir Solenoid Valve
VRESER Vacuum Reservoir Can (Tank)
VRV vacuum reservoir Valve
Color Codes For Ford Under hood Vacuum Diagrams
Black Mainly used for the Evaporative emissions control
Black Thermactor ACV or Diverter valve
Blue Throttle Kicker control
Green EGR function
Orange Heat control Valve (exhaust & intake) (AKA heat riser but more complex
Pink "from the TAB Solenoid (driver's side rear solenoid) to the bottom of the Thermactor Air Bypass Valve
(TAB or BPV/AIR Bypass (AIRB) valve); ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve (AIR Bypass (AIRB) and AIRD AIR Diverter () valve combinations);"
Pink Thermactor Air Bypass Valve (BPV)
Red Main vacuum
White EGR vacuum (source)
Yellow Distributor advance
Yellow from the TAD Solenoid (driver's side Forward Solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold (Distributor Advance in Carbureted Engines