Secondary Air Injection Archives - Tomorrows Technician
Chasing The Perfect Combustion Event

The perfect internal combustion engine would put the exact amount of fuel and air into the combustion chamber.

Secondary Air Injection Tips

Secondary air injection can be supplied actively from an electric air pump or passively from pulse pressure in the exhaust system. In a passive/pulse system, air is drawn in when a valve opens from vacuum created through exhaust flow. In an active system, air is blown from an electric pump, which allows for better control.