Had a light rough idle on my 1993 80 series took it to a mechanic and he narrowed it down to the IAC, specifically the O-Ring. He recommended that I fix the issue myself by ordering the part. He also recommended me to change the TPS sensor on my car because the one that came with it was not OEM. I was able to remove the TPS sensor with ease but I am having a tough time adjusting it down to 600-700 rpm and the lowest I can get it is 1k. Another issue I am having is removing the IAC. I am using a ratchet screwdriver with some WD-40 but it just won't budge and I don't want to damage the head. Any tips?
