How the crap are you running a 12.1 in a crew cab with stock injectors and cp3?
I dont know man, i went into the day expecting a 12.27, had that number in my head all week. My second run was a 12.16, then all i had in my head was that 11.99. Lol.
Loaded a new TCM tune that morning because the 02 OS that I had a tune built off of was dropping the nose bad on the 1-2, 3-4 and 4-5 shifts. The 01 OS that I loaded is basically stock except for higher shift points and i extended the 3250 torque management values out to the end of the table. I had a theory that the 3300rpm set for the 1-2 shift was getting blown by so fast that the TCM was pulling a ton of fuel to try and catch it, and it appears that I was right, because now at 3700rpm 1-2 shift it shifts and locks up beautifully.