ok i am at a stand still i ahve a 91 civic si with a zc japanese motor in it with everything done to it now it is reading a code 8 which it says is tdc position. The car will barely idle and wont barely move and the engine light is on. Does anyone know what this is and how to fix it. Everyone is saying that it is a sensor but i dont know where or anything. Any information would be greatly appreciated. thanks