Rear Main Seal

Well after starting the Dart today it was idling awful and my under dash 02 gauge was reading 13.2 (pig rich). I checked my fault codes and I had several which I cleared. My IAC counts were still reading 160. I tried tightening the throttle body bolts, no change, reinstalled my ground strap, no change. Finally I noticed that my AFR on the FiTech was at 14.7 and was stuck there. I've had this before so I did what I did to cure it last time, disconnect the battery. After 10 minutes I reconnected the battery and tried it, still stuck at 14.7. I disconnected the battery again but this time I shorted the positive and negative cables together using jumper cables. I started it back up and VIOLA! AFR is now reading and throttle response is back. I will take it for a ride tomorrow and let you guys know what happens.