Thanks. Yes next step would be to take a look at that cylinder plug after all cools tomorrow. I had them all out a couple months ago to try and fix this erratic running and will check my photos since I numbered all the plug photos. No, never did a compression check on the engine, but all was great till a few months ago. Here is that video I mentioned above. I have a stethoscope listening device so I suppose I could climb in there and listen to that injector and see if it sounds different than a few of the others. I try and just do a little here & there since its in the garage with fumes (door open and fans help a little).
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