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Re: CAT C7 rough start
Posted to HD/Fleet Forum on 7/16/2018 3 Replies

It sounds like fuel is draining out of head after sitting. (Causing air in fuel, retarded timing) There is a check valve at rear of head that holds residual pressure when shut off. There is a tiny oring that will come off and get trapped in valve keeping it op... Login to read more.

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