Medium and Heavy Trucks
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Hi Donald. My name is***** will be glad to help. I would first start with cleaning out the tank and fuel system from the old fuel, change all you fuel filters and reprime the system. the old fuel deteriorates over time and will cause these issues. You do not want to run the old fuel through your injection pump or it can cause damage or wear from contamination. Let me know
another thing that will cause this is dryrotted fuel lines. Bend the rubber lines to expose dry rot cracking and leaks sucking in air.
Replace any dry rotted hoses as it is the same as trying to suck through a straw with a hole in it causing a starvation of fuel.
Pleasure to help