i bought my 95 z28 in the spring of 2001 and it ran great. i had no problems with it (performance wise). i t was really fast (to me) and fun to drive around. now that i've gotten over my three month period of spinning kiddies and toppen it out at midnight south of town, i don't really "get up on it" that much. most of my driving is in town and pretty slow, but when i go out of town i usually try run it real hard through the first three gears(its an automatic). when i first bought the car, it would go up to the solid orange and almost to 6000 rpm and then shift, but now sometimes it won't even get to the checkered orange(5000 rpm) and the engine makes weird noises(like it is floating the valves) and that's when i let off the gas. it doesn't do it all the time though, sometimes it runs just fine and other times it doesn't. i was wondering if anybody else has had this happen to them and if they have any suggestions to fix it. thanks.