I recently removed the pipe going from the intercooler to the throttle body and noticed oil and gunk around the mouth of the throttle body. I plan to flush out the intercooler ASAP as well as remove the breather that goes into the turbo and cap it off. For the longest I have been wondering why it runs a little rough. The new chip helped the idle a bit but I think I just need to go through everything. Should I replace the idle control valve or anything else while I'm at it?