Sounds like you might be sucking air on the intake side somewhere from pump to the tank. Could be anything from a rotten hose, loose fittings or even a loose filter. Often when you are experiencing fuel shortages a Cummins will keep running but be noticeably short on power and when it gets bad enough then they will die. Look things over and make sure your hoses are in good condition.
Probably keeping the tanks near full will reduce the issue if you simply need to keep it going till you have time or get it somewhere to deal with it
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Last edited by albertabuck; 05-22-2018 at 02:06 PM.
Reason: added comment