Watched the video, sounds/looks like an intermittent miss to me. The engine shakes more than it should, especially at idle. Have you tried cracking one injector line at a time to see if you can narrow it down to a certain cylinder that isn't firing correctly? Could have an injector nozzle hanging up. I'd also run a piece of clear hose for the fuel return from the pump/injectors and see if you're getting any air bubbles. You can have air pushed into the injection pump from a fualty injector which will really screw up how it runs... Ask me how I know! If you don't see any air, but can narrow it down to a particular cylinder, I'd do a leak down test of that cylinder, and depending on your findings, I'd swap injectors from one cylinder to another and see if you mis-fire follows the injector.
Jason
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