pmmcanon
Site Supporter
I'll kindly disagree . The vacuum value is just this: vacuum... higher vacuum means less air, if you unscrew fully the sync screw you get no vacuum but fuel air. Anyway this seems not your problem, I was referring to air-fuel ratio.Wouldn't a higher vacuum mean it's getting more air at idle. It's sucking in more air. When going to 4k rpms the values were higher. Idle screw works just fine. Can move 900-2100rpms if I want, have it sitting right at 1260-1300. Last time I had the air box off there was no visual issue with the actual butterfly valves. All moved together.
On the valve check topic, I would assume if they are out of spec they would be out on the high side (too large a gap). Not sure how you can wear things out and the gap would get smaller. So if there is an issue it could be that the valves are not opening all the way.