Control Valve
Control valve opens when intake manifold vacuum exceeds 21" Hg (1970-71) or 20" Hg (1972-73). When open, it allows intake manifold vacuum to operate throttle bypass valve and distributor ignition retard control.
Control valve opens when intake manifold vacuum exceeds 21" Hg (1970-71) or 20" Hg (1972-73). When open, it allows intake manifold vacuum to operate throttle bypass valve and distributor ignition retard control.