I went up with a friend today to break in new sleds. He has a new holdover 16 axys with a sidekick turbo. The sled would not idle for more than about 10 seconds and would die. It ended up fouling a set of plugs at about 5 miles. It seemed to run ok on the top end other than detonation sensor going off and not pulling full rpm. I am guessing the low rpm was because of detonation. It was really really rich at idle and low rpm.The sled was set in ethanol mode running straight 91 octane non ethonal fuel. We unloaded at about 4500 ft and we're riding front 6000 to 7000 ft. Has anyone had these issues yet that can maybe shed some light on what the problem may be.