GL500i Right Cylinder Spark Problems, July 10, 2021

So a while ago I figured out I have spark problems on the right cylinder. Kind of odd as as soon as I pull the spark plug cap off by about an inch there is great spark. General theory is this is a sign of weak spark and there’s a weak point in the system … somewhere. Also seems to be a recurring mystery via CX/GL forums that new spark plugs, new coils, new caps, new cabling doesn’t seem to fix so it could be a general grounding matter with the whole system and not related.

Anyway, I took the right spark cap off, took it apart, and cleaned it. Before and after pics below. The first time I put it back in it fired right up. Problem solved, I thought, thinking it just needed to be cleaned. Until I let it sit for a few days and tried again in the morning …. cold start … pull out about an inch and instant spark … Oh well, back to the drawing board as they say.

spark plug cap and interior pieces – set screw, resistor, metal spacing bar, and spring
resistor end and bar end before cleaning. thought this may have been too dirty to keep a clean connection but cleaning did not work as set normal and still sparks fine when pulling out about an inch
cleaned end of metal rod with sand paper, then resistor. worked like a charm the first time but not 2nd, will have to see going forward.