Need some advice

[Phenix_Rider]

Finally got around to syncing the TBs on my bike. After I found the easy way to disconnect the fuel pump electrical, and got the little bastard air screws loose without destroying them, I found that there's no way in hell to adjust them with the airbox on. So I had to remove the airbox sensor and let it hang out so the FI light would stay off.

Here's the screwy part: Those air bleed screws don't seem to change the vacuum reading. It bounces between 20-30mm/Hg and I'm trying to set it to 26.5mm +/- .5mm at 1350RPM +/- 50RPM. I can wind one all the way out, and all the way back in and not notice anything different. Of course, it's been 33k miles, and you're "supposed to" check them every 7500. Any ideas?