When I bought my 00 si the kid had a mess. He was trying to turbo it and failed. Anyways, I got it all taken off and had my ecu re-tuned, p28 chrome. Well we never messed with this fuel pressure gauge on it. Idk the brand but its set to 44. Isnt that too high? Now the car is basically stock except some bolt-ons and the tune. After cleaning my car within a week or a little longer my rear bumper gets black specs all over it & around my exhaust tip is black on the bumper. 1)could this be why im running rich? 2) how do I adjust it to stock settings? 3) what is the stock settings and 4) will I need a re-tune after I adjust this? Help would be seriously awesome!