I know that custom tuning will void the mfg warranty that comes with the purchase of the ST if Ford deems the problem was caused by the tune. I’m curious if anyone has run into issues with an extended warranty from Ford or another warranty company. My assumption is that you pay extra money, in some cases a lot of money, for that extended warranty so you should be able to have a problem fixed if it is something that is covered under said warranty regardless of a tune. Has anyone dealt with this type of situation?