mounties83

Does anyone have any issues with their Evo in tow and performance canned tune. I have a 2008 5.4 and the truck acts up in those tunes only. I updated the programmer which I do every 6 months or so and it has a varying throttle in 2 and 3. If you hold the gas steady in 2 or 3 hear the throttle seems to almost be rough in a sense. I'm just not sure why it would only do it in 2 and 3 and not 1. Any input would be great. I've done just about everything except clean the throttle body. Thanks