i turbocharged my si about 1 month ago and everything was cool but a couple days ago i got my exhaust put on 2 1/2 in. piping all the way through no cat and im getting a code for running to rich. so know its trying to lean it out and its causing me to bogg. i also got a o2 heated sensor malf. these are the 2 cels i got p0135, and p0172 help!! what can i do to fix this?
