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If it runs for even a few seconds than pretty much all the air should be out of it. air is one of the biggest diesel killers. I would check and make sure all fuel lines are tight and make sure you plugged all the sensors back in. Also you may want to check for codes if you can. Maybe you got a couple injector circuit codes because you might have possibly not have tightened all the injector electrical connectors, harness, etc.
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