04 c15 mbn Erratic boost pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Trixter, Jan 30, 2019.

  1. Trixter

    Trixter Bobtail Member

    5
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    Jan 30, 2019
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    I have an 04 c15 mbn engine that has around 2000 hrs on a platinum rebuild. I just put a new borg Warner turbo on it this past summer. Some times when I’m pulling hard the boost pressure climbs to 35 lbs momentarily then drops back to 30 lbs where it usually runs . it’s done this since before the rebuild I believe and I’m unsure why. The engine runs great and gets decent fuel economy. Engine is programmed to 550. All new intercooler and no piping leaks either. No engine codes showing at all. Thanks in advance.
     
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