The vacuum control valve relieves pressure in the float bowl under hot driving conditions. See the attached links below for additional information.
K6
Mazdatruckin.com
Need to know which one you are looking for or, what does this vacuum control valve control.
There is a heater control valve on the 1999 Ford Ranger. There is no thermal vacuum valve on this year of the vehicle.
The heater control valve is used to shut off hot coolant from entering the core when the heater is in the off position. A heater control valve can be actuated by either a vacuum line or a cable from the vacuum heater control valve to the heater core. This hose should be warm; if not the heater control valve is stuck and needs to be replaced
The vacuum control valve releases pressure in the float bowl under hot driving conditions. See the links below for additional information.
Swirl Control Valve Control Vacuum Switch
Its a Heater & A/C Control Vacuum Control Solenoid Valve
0.012
There is no heater control valve on this generation of dodges like there used to be... the water flows constantly through the heater valve.. the only control is a trap door that allows cab air to be run through the heater core and is controlled by a vacuum solenoid in the heater box.. the temp control is also vacuum operated but be sure to check the vacuum supply line coming in from the engine.... it has a check valve in it that can be keeping the controls from getting enough vacuum to operate properly.. if you don't have a mighty vac just get one of those packs of barbed vacuum fittings from your local shucks and bypass the valve temporarily and see if you get heat... hope this helps
The EGR (Exhaust Gas Recirculation) valve opens when vacuum is applied. The EGR vacuum solenoid opens and closes the vacuum supply to the EGR valve when it is commanded to do so by the ECM (Engine Control Module).
The Vacuum switching valve controls the EGR Valve.
swirl valve is located cloce to throttle body has two vacuum tubes
.012 int.-.012ex.