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International Automotive Technicians Network
Re: 2007 4300 DT466
Posted to HD/Fleet Forum on 7/25/2020

Two things come to mind: First is EBP return tube is choked up and the other is the CAT particulate filter is slam choked up.. The tube can be cleaned out with a wire and carb spray typically. The particulate filter can be send out for cleaning of replaced.

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