Firebird V8-305 5.0L VIN E TBI (1989)
Catalytic Converter: Testing and Inspection
Proper diagnosis for a restricted exhaust system is essential before any components are replaced. The following procedure(s) may be used for diagnosis:
Exhaust System Test at A.I.R. Pipe
CHECK AT A.I.R. PIPE:
1.
Remove the rubber hose at the exhaust manifold A.I.R. pipe check valve. Remove check valve.
2.
Connect a fuel pump pressure gauge to a hose and nipple from a Propane Enrichment Device.
3.
Insert the nipple into the exhaust manifold A.I.R. pipe.