Is black smoke with a manual in between shifts normal? My huess is ots becaise the turbo has to build boost again and once it does that the smoke clears up. So its like a 3 second puff in between shifts. Now if you're fairly light on the throttle its nice and clean, but get on it more than that and you get the 3 second smoke puffs on each gear. Wonder if I need some injectors at this point? 250k?