hello peoples. i just purchased a 1998 grandprix gt and have had some issues with it. the one i have right now is misfire on #1. i changed around coil packs and same thing is going on, misfire on #1. i have noticed its not shifting right anymore either. it seems to be hitting rev limiter. if you put your foot to the floor, it will hold in the gear and not shift untill i let off the throttle. now i have another issue today and the engine is bogging. no revs over 3000 rpm. already put plugs,wires,crank sensor. please help