Hey guys been having some problems with the nav.. it blows white/blue smoke when idling and pulling up at lights. Been to a few places and can’t seem to find what’s going on. Recently put a new exhaust on but no tune yet.still had the same issue with the standard dpf though. It is going for a tune within the next couple weeks. The engine keeps making oil wondering if I have a fucked injector or if the tune will stop this issue. No engine lights, no codes, and no loss of power.