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Thermal timer switch. 140-160

posted by  uniberp on  Tue Apr 15 03:02 CST 2003
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last visit: Mon Jan 31 07:08 CST 2011
[RELATED]

The thermal timer switch closes (New spec) when water temp is below 90 F, I believe, which opens the cold start injector during starter cranking.
I my experience, older, well run-in b20's (probably b30's also), don't need this extra gas, and seem to be hard to start when warm, possibly flooded.
Could be of 2 reason I can think of now.
1. Engine cools quickly enough to close switch, but even mildly warm engine is easy to start without cold start injection.
2. Switch degrades in performance, staying closed longer and at higher temperatures.
I bypassed my TTS with a dash switch, which I only had to use in the coldest weather.






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