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Re: School Bus Lacks Power - OLD DIESEL HELP
Posted to HD/Fleet Forum on 7/11/2019

I'm with David Lofland on this one. Any restriction in the return circuit will cause these symptoms. The check balls clogged on ALL the 350 GM diesels, same pump. Adding to this, you stated you replaced all the injector return lines. With this in mind, check t... Login to read more.