pontiac Workshop Repair Guides

Pontiac Workshop Service and Repair Manuals

Thermal Vacuum Valve, Air Injection > < High Vacuum Air Control Valve
Page 1
background image

Air Injection Control Valve: Testing and Inspection
Low Vacuum Air Control Valve

1. With engine idling at normal operating temperature, disconnect vacuum line from low vacuum mode assembly.
2. Check to make sure air is diverting to air cleaner. If not, replace control valve.

NOTE: 

-

SEE EMISSION CONTROL APPLICATION CHARTS to determine application of control switches and valves. 

-

Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.

Thermal Vacuum Valve, Air Injection > < High Vacuum Air Control Valve