On stock power my truck is fine, but with the SMARTY at level one it is smoky when accellerating. On level three or five it is just plain embarrasing..... the smoke just billows from the tailpipe regardless of how easy I roll in to the accellerator pedal. Gigantic clouds of black smoke at half throttle are not my idea of performance or keeping up good public relations on behalf of the diesel driving community. The problem is especially noticeable when accellerating out of a corner after slowing in to the turn. This has been going on for some time now ( 4-6 months)... . what's the deal?