Hi everyone,my first time on this site.I to have the same problem with revs holding between gear changes on my vy storm ute which is a v6.I spoke to a auto electrical guy about the prob and he suggested unplugging the idle control motor plug to see what happens.So have now been running around for over a week with no real problems.The only difference is the idle speed is approx 2 or 3 hundred revs less when idling.I have also worked out by putting a switch on the power wire to the idle motor it can be turned back on at any time if need be if I plug it back in.The revs between gear changes is now normal.The plug on the idle motor has 4 wires the pale green wire on the outside is the one I put the switch in not the one on the other outside with the black stripe as this one will cause the engine to start revving.
Cheers