OK so I drove to work yesterday with the perf. tune still loaded and tried to induce a lean DTC and never got one. Then before I left work last night I loaded the tow tune for the drive home. I was able to induce a lean (bank 1 and 2) DTC with the tow tune loaded. I have to say though, I was much happier with the feel and performance of the Tow tune! It was exactly what I would expect a tow tune to feel like and gave the throttle response that I was hoping to find in the Perf. tune. I could hold my foot in the throttle through the shifts and it never lagged, as opposed to the Perf tune where the power drops out after shifting. I hope this helps explain it for you Bill. I will say that It seems that the lean DTCs only show up if im doing a real hard accel. from a stop or when going very slow (less than 10mph)
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