so i have a ram air intake, o/r x pipe, and pypes violator catback.. My car idles a little rough, seems to be a little slugglish latley and now even with MIL eliminators my check engine light comes on.. Im hoping a tuner will help me with all this. I have a few questions though.. will i (myself) be able to tell my tuner what i have on my car and make a tune by my self? Or do i need to take it somewhere? And will i be able to turn off my back o2 sensors? also will it be able to check my engine light to tell me whats wrong with it if its not just the back o2's? Any help would be great.