Quote:
Originally Posted by Diseasel300
Check the vacuum pump. If it has failed, it can cause catastrophic damage (timing chain and worse). Alternator should have no effect on a diesel once it's running. Everything important for the engine to run is 100% mechanical. You could remove the battery and alternator entirely and it should still continue to run.
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I agree with your assessment that the diesel engine should be a pseudo-perpetual motion machine once set in motion (obviously with the energy input in the form of diesel fuel). However, something was pulling on the battery causing it to stall shortly after it got a mini-boost via a jump from my truck. I didn't put a voltmeter on the battery, but there is no doubt that it would restart with jumper cables and die within seconds after they were removed.