Just started to see that that my idle has a slight bounce to it the past few days. It's more noticeable in park than drive. At park it will jump from 600-1000rpms and drive is about 300-500rpms. Now sometimes it will be fine after driven for a while. When braking it will drop from 800 down to 300 than bounce back up ever time and rest at 500, now I never really looked to see if that's normal or not so any help would be great to clear things up. I'm thinking it might be the new houses I put on my TB a few weeks ago that need to be tightened a little do to the weather but what else could cause this if that is not the case.