Air Control Valve
NOTE:
Engine must be at normal operating temperature.
- Disconnect hoses from valve and connect suitable hand vacuum pump (J-23738) to vacuum nipple. Start engine and note output from air control valve. Air pump pressure should be present at "upstream" port ("downstream" port on California). Little or no pressure should be felt at opposite port. If present, replace valve.
- Apply 10 in. Hg to small nipple on air control valve. Air pressure should be present at "upstream" ("downstream" on California) port. Little or no pressure should be felt at opposite port. If present, replace valve.