Quote: Just spray everything including the TB side. I have connected power to actuate the valve but it doesn't seem needed if it seems to be working, just spray both sides. Not sure on that cap. It could be a problem but I would think it would be more noticeable of a stumble if it had a vacuum leak.
I haven't sprayed the throttle body or the IAC yet, I wanted to see what difference the new vacuum cap made.
Before I was idling (in gear) at about 600 rpm (according to the dash tach).
I put on a good plug and now I am idling about 800, so some of a difference there, but the rough idle "shudder" is still there.
I will keep playing around and keep you guys posted.
