XJ-S Convertible (XJ27) V12-6.0L (1994)
Catalytic Converter: Testing and Inspection
1.
Visually inspect exterior of converters. If severe damage is noted, such a dented, crushed or rusted out shell, replace converter.
2.
Whenever a converter is removed from vehicle, check ceramic element through exhaust inlet and outlet. If element is clogged, melted or otherwise
damaged, replace converter.
3.
If a converter is suspected of being restricted, measure exhaust backpressure.