Air Injection System: Operation: Notes

The air injection pump receives clean air by means of a hose, connected to a fitting on the carburetor air cleaner.

This rotary vane type pump has been designed to draw air in and compress it to produce maximum air flow with quiet operation. Fresh air line from air injection pump is routed through a check valve, which prevents exhaust gas from entering air pump in the event exhaust manifold pressure is greater than air injection pressure, or in the case of an inoperative pump. The compressed fresh air is injected through an injection nozzle at the exhaust ports. A relief valve on air pump controls exhaust air flow to a preset pressure.