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.
Disconnect it and find out maybe? Not getting any CEL's are you?
I had the same problem you did. I switched out air filters and my problem was solved. Try cleaning out your air filter or replacing it.
I had a similar problem when my air filter got wet. Drying the filter and cleaning the MAF with carburattor cleaner completely solved the problem.
Thanks, im gonna clean the air filter this weekend and see if that solves it