Originally Posted by Fstarocka
Plugs are brand new.. Tried old plug in cyl 3..no difference.. Yes friend pumped bulb during bogging.. No change.
Did wot run, top two were nice tan, bottom wet fuel, like it wasn't firing at high rpms.. Thing is jumping all over the place..
All fire perfectly at idle.. Think timing is wrong somehow..
Tx for the suggestions so far.. Think I've covered fuel supply and some base settings..
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Check the resistances and examine for cracking in the coils if you haven't already.
I have seen cases where modules work fine when cold, then when warm, they expand a little bit and the spark randomly grounds out.
Maybe run the engine in the dark and look for any arc'ing?