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Forgot to mention: In the past with TMC stage 1, during a warm-cold start (engine cooled for 5-6 hours but not cold enough for a cold start), there is some serious rough idling when you start the car and the A/C kicks in.
RPM will fluctuate between 1k and drop to 500 and goes back up to 1k again before falling to 650ish (default idling rpm?). The car will vibrate violently and feels like the engine is going to die.
But this problem has disappeared after installing stage 2.
Note: I also had this problem with AFE tune, but it was not that pronounced.
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