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I tried to adjust the valves snug with the special tool .004
IMO the idle has always been a bit uneven now that I could compare it to my friends 930 engine.
Pulling a plugs is not a good way to try to isolate non firing plug but I tried to pull 2 at one time but it was not good either.
Dizzy cap looks fine and is probably only 8tmiles old just like the wires. No carbon tracking.
Timing is dancing even if it's not backfiring. The mechanical advance moves freely. Hooking strobo up at the end of each plug is a good call.
Earlier I watched the engine in the dark, could not see any arching but will do it again.
Plan now is to try a new 1.2Kohm rotor. Then measure the wires and swap a new cap. Put back the original plugs with the original 0.025 gap unless bigger is better for idle (then 0.04).
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