Idle erradically

Hi" have a 82 oldsmobile cutlass supreme v6 3.8 The problem im having is when im at idle in park or in drive. The engine light goes on only at idle. When I drive off giving gas the light goes off. I also feel like im lacking power. I replaced the following: spark plugs (properly gaped), wires, coil in cap, cap, rotor, distribitor, all new vacuum lines, pcv valve, breather tube and grommet, egr valve, egr vacuum control solenoid, one way check valve, thermal vacuum switch, fuel pump, fuel filter, o2 sensor, map sensor, carburetor, and a complete engine overhaul at final. After all this the carb start runs out of tune. Any suggestions, PLEASE HELP.