I know this is a late response but it may help someone.
Had this issue on a company truck years ago. After many alternators and a wiring harness we discovered the glow plug relay was sticking. After correcting the issue and driving a few more miles a glow plug came apart and went through a cylinder. I recommend replacing the relay and plugs. That is what fixed that one. Well a long block fixed the plug issue so i recommend doing them before they come apart if this in fact your issue.
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