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Super Moderator
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Vacuum Line Routing Diagram in a 80 302, 351W & other engines
Source: by Chilton

Acronyms, Carbureted
acronyms (not nec. for your year/engine)
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

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 BPV is the AIR Bypass (AIRB) Valve; also called the TAB (Thermactor Air Bypass) Valve

BV: Bowl Vent (on top of the float tanks)

CARB: Carburetor

CPRV: Canister Purge Valve

CBD: Closed Bowl Distributor

DIST: Distributor

DV-TW = Two Way Delay Valve

EGR: Exhaust Gas Recirculation

EFCA: Electronic Fuel Control Assembly/ (Fuel Pressure Regulator (FPR)
FLTR: Filter

FPR: Fuel Pressure Regulator

HEAT VLV INT = Heat Vacuum Control Valve Intake, (next to carb)

HICV = Hot Idle Control Valve

IVV: Thermactor Idle Vacuum Valve

LCV = EGR Load Control (WOT =Wide Open Throttle) Valve)

MAN VAC: Manifold vacuum-Vacuum source

MAP: Manifold Absolute Pressure

PURGE: Vapor Canister Purge Valve

PV: Ported Vacuum

PVS: Ported Vacuum Switch (PVS) Valve

PCV - Positive Crankcase Ventilation

SA-FV - Separator Assembly Fuel/Vacuum

SOLV: Thermactor Solenoid Valve

SV-CBV: Carburetor Fuel Bowl Solenoid Vent Valve

TCP: Temperature Compensated Accelerator Pump

VAC: Vacuum

VCKV: Vacuum Check Valve

VRESER: Vacuum Reservoir Solenoid Valve

V REST on earlier years such as SEABRONC's 83 is a Vacuum Restictor/delay valve, it delays vacuum for a certain amount of time

VCV - Vacuum Control Valve

VRV: Vacuum Regulator Valve

V CK V: Vacuum Check Valve

VOTM - Vacuum Operated Throttle Modulator

VRDV: Distributor Retard Delay Valve

TVS: Throttle Valve Solenoid (aka Solepot, Dashpot)
TVS: Temperature Vacuum Switch

TVV: Thermostatic Vacuum Valve (aka Ported Vacuum Switches)

VRDV = Vacuum Delay Valve (VDV, VRDV, DV-TW)

VDV = Vacuum Delay Valve


Super Moderator
26,966 Posts
yo, yw
Somehow I failed to add these two.


Super Moderator
26,966 Posts
and esp. great!
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