I also have that problem. I've had my clutch replaced when my oil pump went out and had to replace my entire engine! GT-S 6-speed. Also i would like to add ,does anybody know about the power boost that i used to get at 6000rpm? Now its gone .it never really worked rite on the new /used engine that replaced the original! I cant seem to find anyone who knows what im talking about,can someone please help me find whats wrong with my baby!! Feel free to hit me directly or pass it on to someone who mite know.gjenkinsjr34@yahoo.com thanks.