Recent content by R G F

  1. R

    Engine Vibration

    I have done this and the engine is smooth at any rpm in 8-. My understanding is that MDS disables 4 of the cylinders. I was wondering if this unbalanced the engine or if there was another problem.
  2. R

    Engine Vibration

    No oil change yet. I thought it was due at 5000 miles. I run 89 octane.
  3. R

    Engine Vibration

    2021 1500 Laramie Etorque. I have an engine vibration at 1400 rpm. This only happens when the truck is in "ECO" mode. It is most noticeable at 43mph in 7th gear or 53mph in 8th gear. I can shut off the "ECO" mode and the engine is smooth. Is this normal?? The engine/transmission stumbles...
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