have a duetz fahr tractor Model Agco Plus 87 built in 10-07 with 4 cyl SAME Engine family # 7FGXLO6.owto with 1180 hours. changed the oil and filter and it began smoking and seemed to lose power. So changed oil and filter again..no change still smokes bad and uses lots of oil (a gallon in an hour) I suspect internal engine problem but could it be computer related? Any help will be appreciated..\