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Auxiliary Air Valve

  1. Engine coolant must be below 86°F (30°C) for cold condition testing. Ignition must have been off so element in regulator has not been warmed up. Disconnect wiring from air regulator. Start cold engine and let it idle. Pinch either regulator hose. If idle does not decrease, replace auxiliary regulator.
  2. Engine oil temperature must be above 176°F (80°C) for warm condition testing. Attach wiring to regulator. Start engine and run until at operating temperature. Pinch either regulator hose. If idle speed does change, check voltage supply to air auxiliary regulator.
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