That works great unless the vamo is misreading. If the coil is really all over the map, thats good news - VW will follow it around. If the ohm reader is unstable (and the coil is stable) then VV is the way to go. (I haven't seen back to back measurements change, although I've had a few weird readings. I just take it off and back on, then retest and its fine. Oh, and I've got some that read as much as .5ohms different between vamo and evic. I should test them on the multimeter and see who is right..)