Pulsed Secondary Air Injection: Testing and Inspection

Fig.28 Air injection system.:

The Air Injection System operation should be suspect anytime high tailpipe emissions or unusual exhaust noises are present and the ignition and fuel systems have been verified to operate normally. Testing and inspection are as follows:

a. If the system uses a vaccum operated control assembly, check to ensure that the controller is functioning by applying a vacuum to the unit. It should hold vacuum. If not, replace the vacuum control valve assembly.

b. Remove the screws attaching the reed valve cover to the case. Inspect the assembly after cleaning with clean gasoline. Any cracks, dents, or warpage of the case, reed valve or reed stopper indicates replacement is necessary.