Civic Sedan L4-1590cc 1.6L SOHC (D16A6) MFI (1990)
Catalytic Converter: Testing and Inspection
Fig. 51 Three Way Catalytic Converter Exploded View (Except HF)
If excessive exhaust system back-pressure is suspected or if tail-pipe emissions are too high (while all other systems check OK), remove the catalytic
converter from the car and make a visual check for plugging, melting or cracking of the ceramic grid inside. If any of the visible areas are damaged,
replace the catalytic converter.