So I'm in the market for a tuner. I'm leaning towards an X-cal 3 is that a good one? The big thing that I'm wanting to know is where to purchase one from. I have Longtubes and their throwing a engine light so I need the tuner to fix the o2's up front as well as turn the ones off in the back.

 

You must have missed this recent thread when you did you search

https://mustangforums.com/forum/4-6-...hing-else.html