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idle speed

  1. Cummins Tech Section
    I just got my tach in and a little knowledge is dangerous. Now im wondering if my Idle is too low. Unloaded its 760RPM and Drops to 660 RPM when i drop it in "D." Vibration increases at this lower idle so if it low Ill bump it up but I dont want to have a High Idle unloaded. Is the Idle...