Vanagon F4-1970cc 2.0L (1982)
Auxiliary Air Valve (Idle Speed): Testing and Inspection
Auxiliary Air Regulator, Checking
Note: When engine is cold, regulator is open fully, allowing additional air to engine
Auxiliary Air Regulator Components
1 = Bimetal spring
2 = Heating coil
3 = Rotary gate valve
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Check regulator electrically by pulling connector off and attaching ohmmeter to both terminals
Meter should read approx. 30 ohms
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Check mechanically by pulling off both hoses and blowing into regulator
With engine cold, regulator must be open
With engine warm, regulator must be closed
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Turn ignition ON
After 5 minutes, regulator must close
