Cold Start System

The cold start system provides additional air and fuel during cold engine starts. It consists of an auxiliary air valve which provides additional air, cold start injector which delivers additional fuel and a thermo time switch which controls operation. The thermo time switch has a bi-metallic contact surrounded by a heating coil which is energized during engine cranking.

This switch limits cold start system operation to 5-12 seconds during extremely cold engine starts. When engine temperature is above 95°F (35°C), bi-metallic contact breaks ground circuit of cold start injector and cold start enrichment is by-passed.