Hi all! Recently purchased a 91NA FC convertible about a month ago and today, I installed a new radiator (Koyorad) and a new air pump belt as when I went to get the car compression tested, the guy said I was missing mine. Everything installed with relative ease (the fan shroud was a nightmare &#128579 but now when I drive the car, at about 6k rpm the car gets this feeling of pressure building and the whole car starts shaking and feeling like it's going to blow up. I've read around on here and I've heard all sorts of possible issues being bad wiring and ground from the ECU, needing a new fuel filter, and needing new secondary injectors. Would appreciate some advice as this is my first rotary. For extra info, the car ran smooth without this issue before putting the new air pump belt on and I could very easily Rev all the way up to redline and the only other mods it has is a racing beat exhaust.