Originally Posted by Yankee5.0
Will be any problem if I just leave it like that or once I get it I just put the program back
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It can be a problem. If they need to search for codes, leaving an aftermarket tune on can make it difficult, and if they need to update the stock tune, they won't know the tune on it is not stock and will flash it.
2013 GT Premium, Red Candy Metallic, Recaro seats, Electronic package, Strut tower brace, Sway bars, SHR flush mounted window louvers, RTR street-spec axleback exhaust, Ford Racing Boss 302 Side Exhaust, RTR wheels, 50/35% Window tint, Steeda black shorty antenna, and Ford OE Matte Hood Vents.