Finally got a break in our Ohio weather so I got take my GN for a ride. My O2 numbers on my scanmaster are all over the place though. Any where from 112 to 688 at idle and not consistent at all. Normal driving was all over the place too. Didn't run it at WOT, so I don't know that value. Question is, will gas stabilizer for storage do that. If it doesn't is my O2 bad? I replaced it about 9 months ago. Have about 12 passes with high octane fuel on it. Second problem was that my idle at start up after letting sit for a few minutes would go up to about 1800 rpms then come back down to normal real slowly. What would cause that. Any help would be appreciated usa