I have a 1990 sundance with a 2.5 turbo and I did a custom flash from d-cal, the flash I used was the "90MP_MTX_3-Bar_Sw-Bst_+20". Im running a three bar map sensor and the 20% bigger injectors. The problem is when i first started the car it ran fine and the air fuel mixture gauge said it was running rich, but when it got up to 180 degrees the o2 sensor changed position and all of a sudden the car started to run crappy and my air fuel gauge went from bieng rich to lean and the car was puffing black smoke out of the tail pipe. PLEASE HELP!!!