I have a 2005 GT with a MMR cold air intake, lowering suspension springs, and an SVT X3 tuner. Recently my check engine light came on and the tuner read a P0171 (lean gas/air ratio). After taking it to the Ford dealership they installed A new sensor in my mass air flow. The code is still being read by my tuner. I called the SVT tech support and the recommend I get a new custom tune programmer. A buddy of mine who claimed they new how to work with them altered a few options some weeks back. I think if I can get a tune specific for my car it will fix the problem. Anyone out there that can help?