every once in a while my car will loose power after about 3500 rpm's when the secondary intake ports should open. it is almost like they just arent opening. the car will still accelerate a little but it just sounds like it will explode if i keep reving it higher. but then if i stop and turn the car off for like 10 minutes or so, and then turn it back on and start driving, it runs fine again. so im not sure if it could be some kind of carbon build up or something just getting held up, or what? it doesnt happen all the time, it only happens every once in a while. please help.
