So it's been about 3 weeks now. Car is not a dd obviously. So car was running great. It's a 2006 GT. Go to move it one morning after it was sitting for a few days and car sounds crammed and voltage meter is in red and all electronics shut down. Once idle kicks down the volts go down and electronics come back. If I hitgas volts shoot up. So I figure voltage reg and buy a new alternator. Not refurb, but new. Same deal. Ok maybe I got a bad one with same issue. Doubtful but I exchange for another. Same issue. So now when I start I have not seen volts jump up yet. I've only driven about 12 miles but the car is still running as if missing, when first start you can hear it almost sounds like back firing but once starts to warm it smooths out. Now if I ease on gas it's ok. But if I give a little bit heavy gas, car hesitates, bogs. I data logged car and had 2 very reputable S197 tuners review and both said everything looks good. I know very shortly the volts are going to shoot up again. I am truly at a loss. One local shop has no clue and said they would need hours to go through all wiring which means a lot of money with possibly no answer. Any help at all would be much appreciated as I am just ready to throw in towel. Battery tested ok, checked wiring to pCm and no shorts. Only recent things are tail lights, front 02 sensors and throttle body within past 2 months. Mods are just CAI, steeda UDP and off road x. Changed plugs and coil packs this summer