Here we see the cause of the issue from Part 1 (which is here:    • DIY Backfire, Exhaust Popping, Power ...  )

The video showing diagnosis and replacement of the other cylinder head that had the spring failure a couple years ago is here: https://schrodingersboxqm.com/uh-oh-b...

Get your Schrodinger's Box merch here: https://schrodingers-box.creator-spri...