I have a 99 civic SI with the B16A2 motor. I recently installed a skunk 2 pro series 64mm manifold and a 68mm skunk 2 pro series throttle body on it. The manifold had an extra water outlet that I closed because I colud not find where it goes connected. but the car started to heat up. so I replaced the thermostat, the temperature sensors (on the block and the thermostat housing), water pump. Any of this changes seemed to stoped it from heating up. The only thing that keeps it from heating is if I turn the tmeperature **** to the heat and keep the radiator fan on with a direct switch. Does any body have a similar problem? OR Does any body know what the problem might be?