i'm having problem with my 99 camry on acceleration. the problem starts when i'm on the interstate and i go to pass someone. whats happening is once i gas it and get to about 90 mph, my rpm guage will drop from 4300 rpm to 3800 rpms for about 2 to 3 seconds and then it will start picking back up. it won't happen again until the next car i need to get around and i do the same thing. does anyone have any suggestions on what it might be? no check engine light ever comes on. i need help with this before i start getting ready to put together my turbo kit.