UPDATE: Hard starting Cummins ISM
Good Morning everyone! Cummins ISM. 95,000 miles. Just had it serviced, replaced water separator, filters etc. including Allison transmission service. Generally used Speedco for service but tried out ...
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Try some additive for diesel to make sure you have gotten all the water out of the system. Many will add some cetane which makes for easier starting. They help take out some varnish in your engine.
