How Can I Adjust Idle Speed? Post by chobo2 » Sat Apr 29, 2017 8:03 pm. Hi. When my car is warmed up and I stop at a light or put it in "park" I get an idle speed of 600. This makes it kinda uncomfortable and I would like to correct. I am wondering if this is something I can adjust easily myself or if I need to bring it to a mechanic. .

how do i adjust idle speed