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I have a 2005 M6 that runs great the first day and starts running worst the next day. It cuts-out (for lack of a better term) not a bog. Mostly when I'm hill climbing at first then eventually down the trail. Every day it gets worst. Last year I put a temperature sensor in it, had a code for this. I've cleaned the power valves. New plugs. No computer codes. There is some condensation moisture in the air box. Mostly powder riding 8-10K feet. Anybody have any ideas or suggestions?