The last few times I took out the Everest at around mid throttle it was making a popping sound, almost like a misfire and it felt like it was kinda low on power. The popping would continue for 5-10 seconds then it would go away and I'd have full power and the sled would take off like a rocket, it was still running/driving great at lower speeds, but as soon as you tried to put any decent speed on, it would give trouble. I put in new plugs and new wires, but the problem was still there. Then today I went out to use it, and it started okay, but was only running on one cylinder. Pulled out the plugs and pulled it over to see if they were sparking. Only one was and these were brand new NGK's with less than 3 hours use on them. Swapped plugs around between the cylinders, and sure enough, one was a bad plug. Put in a different set of plugs and I was good to go, but it was still making the popping sound at around the mid throttle range. Drove it fine for about 10 minutes or so then stopped the sled, but did not turn it off. Idled it for maybe 10 seconds and hit the throttle, and nothing. Had even less power than when it was running on one cylinder. Gave it some throttle and the rpm's went up but the sled didn't even try to move. Turned it off, checked for spark, both cylinders were good. Started it up again, and same thing, no power. Left it sitting for a good 1/2 hour then tried to start it again. Started easy but instantly died as soon as I gave it any throttle at all. Ran for maybe 5-10 seconds before stalling if I gave it no gas. Gas tank was 100% full, actually I overfilled it a bit, used the same oil I've been using, had a good mix ratio, ect. I can't figure it out, everything looks good, good spark on both cylinders, I don't know what to do. It was running decent, except for the midrange popping, then I came to a stop for like 10 seconds, hit the gas and nothing, I have not a clue. Feels like it's starving for fuel or something. I've got no idea what to do, anybody have any suggestions? It was running soooo good, except for that popping which has been getting progressively worse the past few times I've taken the sled out. Need help! I really just wanna ride this sled!