Take the tune out, call Summit, let them know it's a POS, return it and make Summit pay for shipping. Get on the forums and find a tuner that will upload a program without hassle. Your motor is stock, there shouldn't be a problem. Then tell Summit you want that one. For problems there are only solutions.
My brother's Mustang GT had a programmer, never a problem.
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I <3 forced induction.
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