for the last month or 2 ive been driving my car relativley easy as it has been overheating which i fixed today (head gasket). now after i drove it for the most of the day seeing if it was fixed, i realize it doesnt work like it used to. it should make power all the way to the redline, 7600. but it seems to just stop revving up at about 7k, i am not happy with that. i came home and held it off the revlimiter and sure enough, no revlimiter just screaming sitting on 7k. its a d15b7/d16z6 mini me swap with about 155000kms on it. i was thinking a vtec related problem?

 

Timing belt off a tooth?

 

doesnt seem to be.