Had a problem with it missing at idle and was recommended to change the Champion plug it with a NGK Irridium. I did that and all seemed well. Last. Couple of days it's popping and missing bad when I'm just putting around. When I open it up to half throttle or more it goes away, but as soon as I slow down its does it again. If it had a carb I'd say it has trash in it but with efi I have no clue. I run 93 non-ethanol in everything with no problems. Should I go back to the Champion or maybe a plain NGK? I've got to have it for the next six weeks so I can't take it in until after the crappie are done spawning. It only has 7 hours on it.