Performance lose

[PlaneMech]

Hi,

Looking for suggestions. Came back from track and all was well with car. Parked in garage and it sat for 3 weeks during a cold snap. Left trunk open. Went to start and battery was dead. Must be trunk light drained battery. Jump started and pulled out of garage. Car now runs rough. Charged up battery and tested alternator- both good. Drained race gas and filled up with unleaded. Car now falls flat on its face and stumbles when you get into boost. Spools very slow. Rough idle.
Changed O2 sensor, fuel filter, and measured resistance on coil pack-good. Tap tested MAF. Looking for suggestions.

Thanks,

John

 

[Sinful6]

Did you disconnect/reconnect the little orange wire? It sounds like an ECM problem to me. Maybe you left your race chip in?

 

[PlaneMech]

I've tried multiple chips. And disconnected and re-connected orange ECM wire while doing so. Fuel pressure seems fine, and its not throwing a code.

Thanks,

John

 

[PlaneMech]

TTT

 

[PlaneMech]

TTT