TAKE A LOOK UNDER THE INTAKE MANIFOLD AND MAKE CERTAIN THAT THE AIR REGULATOR CONNECTOR IS NOT MIXED UP WITH THE CONNECTOR FOR THE ENG TEMP SENSOR, IT WILL CAUSE IT DO DO EXACTLY AS YOU DESCRIBE THE E CONNECTOR S ARE THE SAME DESIGN, AND ARE EASY TO GET SWITCHED , THE ONE FOR THE TEMP SENSOR HAS A GRN/YL WIRE AND A BLK WIRE THE AIR REGULATOR HAS , A YEL/GRN AND A SOLID GREEN , JERRY