We have an 06 Cat 226b that seems to run fine at idle and WOT but once you get it down to around half throttle it seems to run very rough. With that being said, first thought were a clogged filter so did a FULL maintenance ( inner and outer air filters, fuel filter, LOF, and such) as well as added fuel additive thinking maybe it was a clogged injector but still no change. It's not a life or death issue, but sometimes I'd like to be able to run at half throttle instead of balls to the wall... Any and all help would be GREAT!!
