Vacuum Control Valve
The vacuum control valve in installed in the distributor vacuum line. When the carburetor venturi vacuum exceeds the pre-set value, the air is bled to the distributor vacuum line and then, the spark timing retards slightly.
The vacuum control valve in installed in the distributor vacuum line. When the carburetor venturi vacuum exceeds the pre-set value, the air is bled to the distributor vacuum line and then, the spark timing retards slightly.