Quote:
Originally Posted by RobertSmalls
Speaking of engine kill switches, I want to tone down my idle air control valve. If a cold engine can idle smoothly at 1000RPM, why does the Insight idle at 1800RPM when it's bitterly cold? When the engine is above 100°F, it idles smoothly without an IACV, and when it's above 150°F, it doesn't need to idle at all.
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I think that it idles at that speed initially to force oil to the top of the engine. The colder the oil the higher the viscosity and, subsequently, the more difficult to pump. I believe that it goes to 1000RPM after a short time right? How long? Maybe you could just mod the ecu signal to shorten the high idle to a more suitable time? Or eliminate the high idle entirely and modify the oil delivery to the top of the engine, maybe a Prius-like coolant thermos with oil in it instead? Hmmm, that gives me a good idea....
Good Luck!