Hiya Bob!
Sure Happy it's Thursday! Hope everybody and everyone is in the finest of fettles this day!!!
Maybe an issue with the thermal time switch, that at low enough temps provides a path to ground (closed circuit) to fire the cold start valve or cold start injector? (I mentioned this before? Maybe engine vibration disrupted corrosion at a engine control wire harness connector?)
A worn Bosch control pressure or warm-up regulator, as these age, can make for some hard starting with a cold engine in cooler and warmer temps.
Inside the Bosch Control Pressure (or Warm-Up Regulator) is a bi-metallic spring. With cold engine, the regulator lowers the control pressure (versus injector pressure) atop the fuel distributor piston to enrichen the fuel to air ratio. As the spring ages, become less responsive to the engine block temperature. No engine coolant temperature sensor used by K-Jetronic, so far as I can recall,in your 1983 242 Turbo.
However, with a (as much as one CAN!) vacuum leak free air induction system, engine vacuum should lift the air fuel control unit round venturi plate (and the connect arm that lifts of the metering rod or piston the air fuel control unit to usually start the engine when the cold start valve or injector does not inject (thermal time switch or other cause).
Glad you got it to work again!
Sure Happy it's Thursday (all day long)!
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Jonathan Harshman Winters III: The Mightiest, Greatest, & Most Powerful North American Comedian & Comedic Actor in Perpetuity!
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