What are you scanning this with? 54 is not even a valid code. I don't understand what "fans go to 12v mode" or "sounds like timing is screwed up" means. Fans come on with trouble codes, so you might mean that.
Have you monitored the system voltage with a meter? If it is actually getting an over voltage condition (likely a problems with the regulator in the alternator), it could cause all kinds of odd things. I would rectify that first.
Click the link in my sig for a valid list of trouble codes for the 4th gen LT1 f-body.
Have you monitored the system voltage with a meter? If it is actually getting an over voltage condition (likely a problems with the regulator in the alternator), it could cause all kinds of odd things. I would rectify that first.
Click the link in my sig for a valid list of trouble codes for the 4th gen LT1 f-body.