Pinging on acceleration.

Witchboard said

The arrow pointing at the harmonic balancer is where the timing cover shows 0 degrees. I'll see about trying to pull it to the yellow mark and see what happens, but if I recall, doing that made the car run like trash.

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Dude, that's about 30°BTDC, that would be about the total power timing You'd shoot for....initial°+mechanical adv.°. Check the advance mechanism by popping off the cap & twisting the rotor back & forth against the advance springs, if it's stuck/frozen, it's like running a dizzy locked-out.....not for You Young Jedi....