Mixture Control Adjustment: Notes
NOTE:
The Computer Controlled Catalytic Converter (C-4) system used on the 231" VIN code "2" engine, is sensitive to any change in mixture control adjustment which, if improperly set, can impair the ability of the system to maintain precise control of carburetor air/fuel mixtures. Because of this, the previously used propane enrichment method of idle mixture adjustment may not be used when adjusting carburetors with the "C-4" system.