I have about 40k miles on my 5.0 F150 and I frequently feel a mild stumble at idle. I don't notice any missing while under speed or acceleration but I do feel a surge sometimes under mild acceleration. SInce I'm passed my bumper/bumper warranty, I'm wondering if any of you know of a good tuner in the central TX area? Waco to Austin? Not looking for higher performance, just to get the truck running smoothly. thanks!