So recently pulled the family's john deere 830 out of the barn for the first time in 15 years. We pull started it after we checked the oil and what do you know it ran like it was new. 2 days ago we drove it down to the local tractor show and the tractor didnt miss a beat. Today just putting around it dropped a cylinder when running mid to high throttle. At idle and just above it still runs perfectly. What do you all think? Is one of the injectors bad/plugged? (this is what I think the problem is) Should I try and work it tommorow on a fan? I put some additives in it so hopefully that helps.