Posted 11/23/2014 22:40 (#4197605) Subject: M11 cummins in IH 9200
northwest IL Lee Co
When accelerating, the engine runs rough under 1500 rpm, like running on 5 cylinders, and much smoother over 1500 rpm. Does not matter if loaded or not. Have changed the fuel filter. Truck is a 1997. Starts good and has good power at higher rpm, but kind of doggy at less than 1500 rpm. Any ideas? TIA
M11 cummins in IH 9200
