i just fixed my exhaust leak and my car still idles a bit rough. i have a stock exhaust system with the exception of replacing the cat with a straightpipe. i just installed a air/fuel gauge to monitor stuff and it seems that it is stuck in the middle and never moves. i was wondering how you guys would diagnose this problem. i was thinking that my o2 sensor could be shot (since the a/f gauge never moves) and that would probably make my car idle rough. let me know what you all think -jacob

 

by the way, it is an 87 T2 80k miles, blown turbine.