Where is the aux air valve on an 80-81?
The aux air valve is located on the valve cover on 80-81 models next to AC compensation valve. Labeled below. The valve closes on rising temperature which it senses from the valve cover. It also has a small heater inside to help it warm up. There is a small nut on the side that can be loosened and then moved to adjust the valve.
How does the aux air valve work in a car?
It is a throttle type device only. Any additional air that enters the engine through the aux air valve is measured by the air flow meter. The fuel injection adds the extra fuel to keep the mixture correct for the increased air volume. As the engine warms and loosens up, the valves are heated (both types) and slowly close.
How to adjust auxilliary air valve to increase cold idle?
Adjustment: Before starting the car, loosen the 7mm nut on the side and pry or slide the nut towards the outside of the valve to increase the cold idle. Tighten the nut and check the idle real quick. Not high enough, keep moving. Too high; move back half way and try again.
Is there a way to warm up an aux air valve?
The valve closes on rising temperature which it senses from the valve cover. It also has a small heater inside to help it warm up. There is a small nut on the side that can be loosened and then moved to adjust the valve. You might try that before replacing it. If the hoses are brittle (mine were like plastic) you may consider replacing them.
The aux air valve is located on the valve cover on 80-81 models next to AC compensation valve. Labeled below. The valve closes on rising temperature which it senses from the valve cover. It also has a small heater inside to help it warm up. There is a small nut on the side that can be loosened and then moved to adjust the valve.
When do you open the Aux Air Valve?
The valve is opened when cold to bypass extra air around the throttle plate to keep the idle up to spec while the oil is thicker. It’s action is very similar to fast idle solenoid on a carb. Note: the aux air valve does not effect the fuel injection air/fuel ratio.
Adjustment: Before starting the car, loosen the 7mm nut on the side and pry or slide the nut towards the outside of the valve to increase the cold idle. Tighten the nut and check the idle real quick. Not high enough, keep moving. Too high; move back half way and try again.
How does fuel injection work in an aux air valve?
Any additional air that enters the engine through the aux air valve is measured by the air flow meter. The fuel injection adds the extra fuel to keep the mixture correct for the increased air volume. As the engine warms and loosens up, the valves are heated (both types) and slowly close.