I believe the tuners advance the timing and if the power wire does this because of the cold temp readings and the tuner does it couldn’t it put to much timing into the engine that would lead to spark nock?
Yes it can. That's what the knock sensors are for. As soon as they sense spark knock or unnormal vibrations it will pull timing. Tricking the pcm into thinking the IAT's are lower will allow the pcm to run more timing. Given the perfect environment, engine temps, and higher octane fuel it would work perfectly. On a hot summer day where your engine normally retards timing due to heat soak I would think this power wire to be a bit dangerous. But again the knock sensors will pick up on it and retard timing anyways. To me its kind of a moot mod.
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