dieselnuts
Veteran Member
I had a case of low power coming home last night up a hill. Got code P0234. Over boost. I looked around could not find anything wrong cleared the code and tried the hill again. In 1st I red lined the tack no problem. In second it went to 3000rpms then it stated surging 3000 then it went flat then it surged to 3200 then it went flat again then it surged to 3400 then it stayed there so I shifted to 3rd and it went to 3000 and that was it. Shifted to 4th and over the hill. Does anyone have an idea why it would surge like that?