Computer Controlled Catalytic Converter: Description
NOTE:
Some of the above listed models may be equipped with the CEC System rather than the C-4 System. If equipped with CEC System, see appropriate article in this section.
The Computer Controlled Catalytic Converter (C-4) system is an electronically controlled system that closely controls air/fuel ratio to lower exhaust emissions while maintaining good fuel economy. The C-4 system is primarily an emission control system. Primary objective of C-4 system is to maintain an ideal air/fuel ratio of 14.7:1 under all operating conditions. When ideal ratio is maintained, catalytic converter can effectively control nitrogen oxides (NOx), hydrocarbons (HC) and carbon monoxide (CO).