Thanks man, that will be a big help, now and in the future. I need to buy that chiltons manual. I borrowed a copy one time, and it was pretty helpful. I think I have the surging cured. I found that I had put the clamp, on the large hose on the bottom of the common chamber, a little crooked. So a portion of the hose was not clamped securely. I straightened the clamp and added a zip tie for a little extra security. On the way to work this morning, no surging (and I pushed in the clutch many times just to check for the surging). It is amazing how vacuum sensitive the 2.6 is. It could not have been leaking that much from a crooked clamp, but it does seem to be fixed. So the valve on the bottom of the intake is responsible for the higher idle at warm up? I would like to get this fixed, it would be nice to not have to wedge my CD case between the pedal and the floor, to keep the Trooper running when I scrape the windows in the morning.