I have a 95 trans am (auto) I'v noticed the last two days that off the line when I gun it and it hits the rev limiter it backfires and sometimes there is a slight hesitation off the start and it does not squeel at times? Any ideas guys/girls. It drives fine in the city and highway so I don't think its the optispark (changed it 4 years ago). I know I need to change my intake gasket,slight leak in the rear. (just waiting for my new LT4 intake). Any help would be very appreciated guys/girls!