I put a bullydog 20% in it and it has ran great for 3 years,this year though it would start missing and even die while ideling.I would take it out and would run just fine but not near the power it use to have with the chip, especially in soybeans.I've changed fuel filters, water seperator,cleaned fuel tank vent and still after about a half round in soybeans it will act up. Anyone have this happen? I called bullydog about it he thought that there maybe a loose wire in the chips box, took it apart and everything looked fine. Any suggestions? Thanks