4120 Smoking

[MT. Sparky]

I have a 4120 with about 70 hours on it and it seem to smoke when I'm using it, I also live at about 5500 feet. Has anyone else had tis problem. Its like its running rich. It will make your eyes water. Thanks

 

[KennedyDiesel]

I'd take it to the dealer. The 4000-20 has had some injector issues.