i have the coupe civic 1.6 v-tec for those asking, the cars got a big exhaust for the turbo swap comin up soon, wanted to get the bugs worked out sooner but seeing how mother earth is the culprit of my problems i guess i cant do shit huh? i still think it mite be something in my fuel injection system, cuz its like a drastic change from 4th to 5th, not a simple rpm drop i mean like bucking and bogging down drastically i at least drop 5-10mph as soon as i shift