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Roger_in_VERMON's avatar
Roger_in_VERMON
Explorer
Aug 12, 2013

Ultra Low Sulfur Diesel

We just had a problem with our 2001 Cummins 350 engine with only 65,000 miles. The seals on the injector fuel pump had to be replaced. We were told it was the result of using Ultra Low Sulfur fuel and not enough additives.
Has anyone else had this problem.
Class A
  • The_Texan's avatar
    The_Texan
    Explorer
    Aug 12, 2013
    Many of the Cummins ISB used in busses and delivery trucks had that problem, there have been a few reports of the problem with the early ISC and some ISL engines. It is not common on either ISC or ISL, but can happen.

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