I just got a 99 RS and it idles very inconsistently. When i turn the car on it idles between 1500 adn 2000 rpms, but when i stop at a read light or something it drops really low and seems to stumble. The other day it even stalled. The car came with a SAFC, intake and exhaust on it. It also has an air/fuel ration gauge that the dealership disconnected but won't reconnect. Does anyone know wheather its the settings on the SAFC that are messing it up or is it something else.