How do you know you're running rich? Running rich can cause problems depending on how severe it is. It could make for hard starts, make it impossible to start at all, rough idle, crappy performance, fouled plugs. On a positive note, I think headers look nice at night when they're glowing orange.

How did you "calibrate" your 30# injectors? Did you get a MAF calibrated to 30# or did you get a tune? Or did you just install them while leaving the stock MAF installed?

the maf was setup up for the 30# injectors but the guy that installed my new engine and all said that it wasnt reading right therefore my car is surging sometimes and when i stomp it a little black smoke rolls out of the pipes.......the idle surge is just random more when the car is cold

i havent taken it anywhere so i dont know exactly if it is running rich.......the performance doesnt seem to be hurt and the idle after a couple of minutes of running goes away and smoothes out....car starts up easy and never gets above the 2nd peg on the temp gauge even when i run it hard...just noticed the black smoke sometimes and wondered

Start by gathering the information and confirming it is running rich.......DIY KOEO/KOER/Cylinder Balance Self-Test