Hi all, I just bought a '95 civic ex w/d16z6. Ram-air, headers, exhaust and that's it so far. It's idling low,but I'm pretty sure it's the iacv. When I get to 4500 rpm it feels like i hit an invisIble wall or something. I get to 4,500 and the damned thing just stops all progression. What the hell is going on here? I assume the engine should rev much higher than that. I've read that the cam change over happens around 5,000-5,500 rpm, so is this a problem with the v-tec or what? Any help would greatly be appreciated.