Something else came to mind. When idling, if I turn on my glow plugs, the miss and the pinging goes away. I'll check on how it effects pinging while driving when I get off work.

To my inexperienced mind, that points to my IP and timing being fine, and I really need to yank those prechambers.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap