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  1. 3126 running rough. Looking for some ideas

    General Diesel
    OK so I have a 2002 freightliner with a cat 3126 The engine starts right up and will idle all day no problem it doesn’t smoke and won’t miss a beat. However the second I go over like 2100 RPMs it runs like absolute garbage and burns a **** load of oil (lots of blue smoke) anything under 2100...