I’m looking to understand what sort of smoke this is, I want to say it smells like rich fueling. I have a DE-CAT exhaust manifold. I’ve installed the upstream O2 sensor installed and I have the downstream O2 after the second CAT. I have an error for downstream O2 low voltage when the car is up to temp, I’ve used an IL Motorsport extension loom.
The smoke never clears up. I’ll be looking at the trim value later and see, I’m a bit nervous as I just finished rebuilding the engine myself 
please don’t crucifying me. Video
