Hey guys, I'm not sure what the problem is. The engine seems to run perfect. It has no hesitation, maybe just a slight bit sluggish off the line but I can't tell for sure as it runs the best the car ever has while I've owned it. I did a diesel purge, valve adjustment, new air filter, new air cleaner mounts. the vibration got reduced significantly with new air cleaner mounts & the valve adjustment (did them both at once) but the vibration is still there. I am assuming it could very well be my left side engine mount, or engine shock, maybe my injectors need to be rebuilt, any ideas? also the primary fuel filter has air in it all the time, possible cracked hose?

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1984 300sd auto with 246,000 miles