Once I got everything apart per the fantastic videos, I found that Cylinder 7, which was giving the crazy dashboard errors in the AFM video and running rough since #7 had continuous misfires has an intake vale that never fully closes. I tried to capture in pics that it is always slightly compressed. Much lower than cylinder 1 which is also and afm cylinder.
I pulled the spark plug, shined a light and then used my phone to cover and look down the intake chamber and sure enough I could see crescent-shaped light appear as I moved my flashlight around (with no rocker arm attached per the pics)
Is this also a common problem?
Suggestions on what to do next? (By the way, I live in Austin Area if there are any shops you'd recommend)
I'm assuming I need to pull the head and have the valve replaced along with valve guide, etc. Or am I mis-diagnosing something?
Thank you for all your assistance so far.
By the way, I did by the kit, could bounce the rod a bit, but I suspect it meant nothing since my rod seems to rise as high as the other rods.
This is not a common Issue at all. However it is possible of course. Did this have a floppy loose rocker like in my video? If so, it's possible the lifter collapsed and the pushrod hit the rocker just right (or wrong depending how you see it) that it opened the valve too far causing interference and bending it. Regardless this means the head has to come off and should get a new valve, full valve job and get it resurfaced. I would recommend doing both heads but you could get by with one. Only thing is, if you go that far maybe do a full delete at that point? You should at least replace the lifter in question now though.