I had this issue before and had the alternator rebuilt at a local shop, it didnt solve it. The car runs fine driving around under normal acceleration 13.8 - 14v the problem is when you accelerate quickly towards redline the windshield wipers start going off, the tach dies, and the head lights blow out. My turbo timer says 17v towards 6400 rpm. Not sure i read voltage regulator is in the ecu. Any ideas thanks!