I was told by a mechanic that my truck - 2002 F350 7.3 - already had a tune and he said I would not like it if he removed it. Would that tune need to be removed prior to installing the Hydra?
A/C started blowing, in dash mode, only out of for left vent. I can change to defrost and floor but on dash only the left vent is blowing air and very hard.