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Power Strokes
6.7 Aftermarket
Better Tuning For 11-12 Trucks
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[QUOTE="WHY NOT, post: 1422511, member: 1397"] The MM switching down is it is defueling. Check your defuel settings, I would bet on of the things there is set pretty low. Coolant temp possibly. I think mine was set to 210 and on a grade with a heavy load I had it start to chirp at me just on the tow tune, all the gauges on the dash were fine, just bumped it a bit and it left me alone after that. [/QUOTE]
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