My Mitsubishi play car had a similar idle speed control system originally. Attached to the throttle body was a cast housing with the idle speed control stepper motor and a thermal type air bypass. The thermal bypass like many thermostat type devices failed after many years and well over 100k miles. Of course it failed open so the idle speed control motor would run to full closed position and there was still too much air to keep the idle below the fuel cut RPM so it surged. Since it was in the evolution to a hot rod play car I did not really want the throttle body being heated by the coolant anyway. I made a new body for the idle speed control motor without the additional thermo air passage. Looped the coolant lines together.
Starts fine in what we get for cold weather. Rare that it gets much below 25. Plus it parks in a garage that never gets below ~50. In really cold weather the lack of the thermo air bypass might be a problem though.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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