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Re: Mack MP7 Long Crank Intermittent
Posted to HD/Fleet Forum on 3/11/2019

Injector cups are a major fail point across the mp7/8 and d11/13 series Volvo/Mack engines. If you have put a new filter head on and still have air in return fuel at tank but no air at inlet of head it is injectors and cups. If 3 or more cups have failed repla... Login to read more.