The play in the rotor seems excessive to me. Good observation. I would think that would show up/result in Cam Sensor Retard being off (you previously tested this as good) but based on this observation a worn distributor gear will be the next thing to physically check for if the compression tests are good.

No problem Les, your in charge.

The most elegant way I have seen an ignition drop cylinder test performed is at the distr cap or plug end with a grounded probe. Like Les says you need to ground the spark output so you bring a grounded probe up to the distr cap posts/boot and as you pull the plug wire off you offer the probe as a ground and the spark jumps the cap to ground. I’ve got a video around here somewhere if your interested.

Good luck,

George

@GeorgeLG @LesMyer
Gentlemen,

My apologies for the hiatus. Due to the nature of my employment I was abruptly away for a while but have returned. If I could have updated on the matter, I would have.

I am now back home, and due to the current used car market I plan on trying to continue the fight with this blazer to see if I can get the engine misfires figured.

I took some time to read back through my thread and watch my videos. I think my current course of action is going to be replacing the lower intake manifold gaskets and the distributor. I feel that if either of these do not fix the issues then it has to be something further internal IE: pistons/piston rings or something worse. If that is the case then the repairs are far beyond my resources or my abilities to repair and the issues will be a lost cause.

Looking for your insight on my current plans, if you don't mind. Again, my sincerest apologies for the hiatus. Thank you.