Vacuum Diagrams Carbureted Diagram Vacuum Line Connections Part Line Colors Connects To: ACV Solenoid Valve Yellow Green No. 2 Air Control Valve Intake Manifold Charcoal Canister Green Black Brown Black No. 3 Purge Control Valve Intake Manifold Water Thermovalve Evaporative Pipe Distributor Black Intake Manifold??? Duty Solenoid Valve Red Blue Black EGR Control Valve Intake Manifold Air Cleaner High-Altitude Compensator Blue Black Brown Carburetor ( primary main ) Carburetor ( intake manifold ) Carburetor ( secondary main ) Idle Compensator Black Intake Manifold Num #1 Air Control Valve Brown into Green T-connector Intake Manifold Num #2 Air Control Valve Yellow ACV Solenoid Valve Num #3 Purge control Valve White Orange to Black Green Purge Solenoid Valve Intake Manifold Charcoal Canister Purge Solenoid Valve White Black into Black T-Connector No. 3 Purge Control Valve Intake Manifold Idle Up Solenoid (A/T Only) Brown Blue Servo Diaphragm (A/T Only) Y-Connects into ACV Solenoid Green Vacuum Control Valve Red White Yellow Intake Manifold Secondary Venturi ( in carb ) Float Chamber ( in Carb ) Vacuum Sensor White Intake Manifold Vacuum Solenoid Valve Green Black Intake Manifold Distributor Mixture Control Valve ??? ??? Thanks to BadAssRX7 for his contributions.