:splat I have a 2003 powerstroke with the XCAL2 and I am having a problem where the truck seems to be running out of fuel or something if I floor it in 1st thru 3rd gears. It dumps out black smoke and absolutely does not want to run. I have now put the truck back to the stock tune to see what happens and Ill keep you posted.I have no idea of what this could be so any help will be greatly appreciated. Does anyone have a cure or diagnosis for this problem? Thanks.