Submitted By: BlackBII
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Vacuum Diagram Definitions |
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| Abbreviation | Description |
| A/CL | Located in the air cleaner |
| A/CL DV | Air Cleaner Diverter Valve |
| A/CL BI MET | Air Cleaner Bi-Metallic Valve |
| A/CL CWM | Air Cleaner Cold Weather Modulator |
| ACT | Air Charge Temperature Sensor, prior to 1992 |
| ACTS | Air Cleaner Temperature Sensor |
| ACV | Air Control Valve |
| AIR | 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 (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve |
| BV | Bowl Vent (on top of the float tanks) |
| CARB | Carburetor |
| CBD | Closed Bowl Distributor |
| CPRV | Canister Purge Valve |
| DIST | Distributor |
| DPFE | Differential Pressure Feedback |
| DV-TW | Two Way Delay Valve |
| EFCA | Electronic Fuel Control Assembly/ (Fuel Pressure Regulator (FPR) |
| EGR | Exhaust Gas Recirculation |
| EGRC/EGRV | EGR Vent/EGR Control |
| EXH HCV | Exhaust Heat Control Valve |
| EVP | EGR Valve Position |
| EGR | Valve Position |
| EVR | EGR Vacuum Regulator; also called EGR Vacuum Solenoid |
| FLTR | Filter |
| FPR | Fuel Pressure Regulator (check vacuum line) |
| HEAT VLV INT | Heat Vacuum Control Valve Intake, (next to carb) |
| HICV | Hot Idle Control Valve |
| IAT | Intake Air Temperature Sensor (Air Charge Temperature (ACT), prior to 1992 |
| IVV | Thermactor Idle Vacuum Valve |
| LCV | EGR Load Control |
| MAN VAC | Manifold vacuum-Vacuum source; usually ref. to as Vacuum Tree atop intake manifold |
| MAP | Manifold Absolute Pressure |
| PCV | Positive Crankcase Ventilation |
| PURGE | Vapor Canister Purge Valve |
| PV | Ported Vacuum |
| PVS | Ported Vacuum Switch (PVS) Valve |
| S | Spark port |
| SA-FV | Separator Assembly Fuel/Vacuum |
| SOLV | Thermactor Solenoid Valve |
| SV CBV | Carborator Fuel Bowl Solenoid Vent Valve |
| TCAC | Thermostatically Controlled Air Cleaner |
| TCP | Temperature Compensated Accelerator Pump |
| TK | Throttle Kicker |
| TVS | Throttle Valve Solenoid (aka Solepot, Dashpot) OR Temperature Vacuum Switch |
| TVV | Thermal Vacuum Valve OR Thermostatic Vacuum Valve (aka Ported Vacuum Switches; Thermal Vacuum Valve) |
| VAC | Vacuum |
| VCKV | Vacuum Check Valve |
| VCV | Vacuum Control Valve |
| VDV | Vacuum Delay Valve |
| V CK V or VCV | Vacuum Check Valve |
| VOTM | Vacuum Operated Throttle Modulator |
| VRDV | Distributor Vacuum Delay Valve (VDV, VRDV, DV-TW) |
| VRDV | Vacuum Delay Valve (VDV, VRDV, DV-TW) |
| VRESER | Vacuum Reservoir (coffee can style in earlier years; replaced by plastic style) |
| VRESV REST | on earlier years such as SEABRONC’s 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of time |
| VRV | Vacuum Regulator Valve |
| WOT | Wide Open Throttle Valve |
About The Author
Jim Oaks is the founder of The Ranger Station (TRS), one of the longest-running Ford Ranger enthusiast communities on the web. He has spent over three decades owning, modifying, repairing, and driving Ford Rangers on the street, trail, and overlanding routes.
Since launching TheRangerStation.com in 1999, Jim has documented thousands of real-world Ranger builds, technical repairs, drivetrain swaps, suspension modifications, and off-road adventures. TRS has been heavily referenced by enthusiasts, mechanics, and off-road builders looking for practical, experience-based information.