Well folks, the TBI fight continues. Finally got ALDL configured correctly and WOW! Lost of information, but it has me stumped. Here are the symptoms: Surging idle (700-900prm). Stinking rich idle. Popping in exhaust during initial warm up along with black smoke (mixture waaaay to rich). Hesitation when throttle is quickly opened. Win ALDL data: IAC readings: 40 no change at idle. O2 readings: 0.03 to 0.80v bouncing all over the place. RPM: surging from 700 to 900. TPS: steady at .50v Temp: 185 degrees Flag data: Idle/cool (at 185 degrees?) DRP occured (wtf is DRP?) Closed loop mode (huh ?) Rich flag (no joke) BLM enable (what is BLM?) Error codes: (I disconnected the battery for 5 minutes before logging the data) 42: Electronic Spark Timing (EST) 44: O2 lean That O2 reading has me stumped. If the engine is running rich, why am getting an O2 lean code? Also shouldn’t the IAC be doing something at idle? Like adjusting the mixture and maintaining a steady rpm? Also why is it in closed loop mode? With the temp at 185 degrees, shouldn’t it be out of closed loop mode? This is getting on my last nerve, can anybody help? /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/dunno.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/thinking.gif /forums/images/graemlins/dunno.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/thinking.gif /forums/images/graemlins/dunno.gif /forums/images/graemlins/1zhelp.gif /forums/images/graemlins/1zhelp.gif TIA.