If it's the one in the engine bay you talking about, there is one that connects to the heater tap on joint to the heater hose.
Just un hook the hose's from heater core and put a piece of pipe in them or something and hook them together.
need vacuum hose diagram fast idle ac
To hook up a heater hose to a 305 engine block, first locate the heater hose fittings on the engine, typically found near the intake manifold or water pump. Attach one end of the heater hose to the fitting on the engine block, ensuring a snug fit, and secure it with a hose clamp. Connect the other end of the hose to the heater core fitting in the firewall, again using a clamp for security. Make sure to check for leaks after the connection is complete.
Any place that has constant vacuum Usually on the back side at the base of the carb.
you probabally have a vacuum hose disconnected
One goes from the heater core to the water pump, the other goes from the heater core to the intake manifold.
Cut both heater hoses and hook them together. Make the hose go from the motor to the radiator.
For a 1992 Dodge truck, the vacuum hose routing for the heater control typically involves connecting a vacuum source from the intake manifold to the heater control valve. This hose should run to the control switch on the dashboard, which then distributes vacuum to the appropriate actuator for controlling the heat and air settings. Ensure that all connections are secure and check for any leaks in the hoses, as they can affect the performance of the heater controls. Refer to a service manual for specific diagrams and routing details for your exact model.
You have a vacuum leak somewhere. Trace the main vacuum hose fom the air intake until you find a crack in the hose.
Check the vacuum operated valve at the hose going to the heater core.
i have the exact same problem. the hose comes from around the heater core area but i dont know where the otherend goes
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