I've only had this happen twice in the past 1 week. Never happened before. Under hard acceleration shifting from 2nd to 3rd gear I get a bog in the engine, and it feels like their is something clogging up the exhaust system as the tone of it changes and sounds like their is something blocking the exhaust way. The "SES" light flashes on and off and then after about 30 seconds the engine is fine again. I hooked up my Predator but no trouble codes showed up. Traction Control was off. Any ideas?