So starting a few months ago my truck started blowing a little black soot out of the exhaust and I messed with it here and there and over time it got worse and worse. Engine was just rebuilt over the summer and had new everything. I've checked the maf, tps, Changed the injectors and egr,checked the fuel pressure and changed the O2 sensor. Still no fix. Last week I found most of the vacuum lines were crossed up and a check valve was backwards. How that happened i have no clue. When I took it apart I left them all hooked to the plenum. Funny thing is it always ran good and passed smog twice in the last 4 years (smogged every 2 years). So far everything tests good as far as I can tell. It also is hard starting here and there and if I shut it off after driving it goes back to running rich and it runs hotter than usual while driving. 2 months ago it ran around 185 and now it runs at 220°. Any advice would be awesome