It almost sounds like there is a disconnect between getting warm air vs having warm coolant? The Insight heats the coolant and in turn gives you heat. When the engine stops, the warm fluid quits flowing. In your case getting the engine to cycle off faster thinking its warm up produces more warm air???
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Originally Posted by Daox
What is a coolant spoofer you might ask? Well the Prius goes through 4 warm up stages before you can get it to turn off the engine every time like you'd like to do. Most of the stages are controlled by the coolant temperature. So, this little circuit tells the ECU that the engine is warmer than it really is to get you through the warmup process quicker. Also, if you have the heat turned on in the Prius, depending on the coolant temp, it will keep your engine running or not. So, the coolant temp spoofer basically allows for more engine off operation.
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