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dm wont stay running


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DM mack will start and run but after awhile it starts fluttering and shuts off and won't start. Have fuel when I push primer, but didn't seem to have fuel while cranking engine with supply line off pump. Guessing I have a supply issue but mack dealer says there not available anymore. Anybody else have or had this issue?

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sound like winter big dog, might be filters or soft rubber fuel line, or something down in the tank being sucked up in the fuel tube, could be supply pump it self, when the truck shuts off how long before it starts back up, there are a lot of unknowing here like are you pulling fuel from both tanks or just one,like cross over line, fuel line rub , hope this is a little help

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