'95 355. This is new. I normally shift 4-5K. lately I've tried to wind it out, but at 6,000 rpm (ish) it seems as if the car is hitting the rev limiter. same behavior. sputtering & loss of power. It's like something is cutting out. I haven't tried to push through it, but when I lift, life is fine. Up to 6K, life (seems) fine. No idiot lights. I haven't tried to pull any codes off the ECUs yet. Except for replacing cooling tank hoses, I haven't done anything to the car in 1-2K miles. Last fix was a rebuilt alternator. Just another odd note - after driving & the car is warm, if I blip the throttle for high revs while standing still, the alternator light may come on. ideas?