sounds to me that the Banks is working. All Banks boxes are engineered to add some power with-out increased smoke. This was their big selling point but I guess we all need to sell at any cost now. Controlling smoke means limiting the fuel at key times. I. E. hard launch and b-4 and after shifts AND at the top end due to the egt limits in the box. I would recommend this to any first time diesel owner that wanted more power. from here the sky is the limit as long as you can afford it. One last note, if you go for more, start with the trans on the auto or clutch on a stick no matter what truck model.