Auxiliary Air Valve (Idle Speed): Description and Operation
By-Pass Air (BPA) Valve:
The Bypass Air (BPA) valve is a thermowax type valve that supplies bypass air to the upper intake manifold to increase idle speed when the engine is cold.
The Bypass Air (BPA) valve is a thermowax type valve that supplies bypass air to the upper intake manifold to increase idle speed when the engine is cold.