Misfiring in the rain - Steve Saunders Goldwing Forums

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post #1 of 13 (permalink) Old 07-14-2019, 10:02 PM Thread Starter
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Misfiring in the rain

Hey guys! So today on the way home from work I got caught in a pretty heavy rain, but after a few miles I noticed it started misfiring bad, felt like maybe 2 cylinders were out, then rain let up and after another few more miles it started running normal again. any ideas?(I should note that the front fender is cut short so I'm sure water throws right against the engine)
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post #2 of 13 (permalink) Old 07-14-2019, 10:23 PM
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A few weeks ago, something like that happened to my, then new, '76 CB550K on the way home from Yellowstone NP. It turned out to be a leaf that somehow got caught in the spark plug cavity. So I'd suggest making sure the holes in the bottom of those cavities are unplugged.

I'm sure that was just a few weeks ago...

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post #3 of 13 (permalink) Old 07-15-2019, 05:11 AM
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Just below the spark plugs is a drain hole that is notoriously plugged which lets water build up around the plug and shorts it out.
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post #4 of 13 (permalink) Old 07-15-2019, 06:33 AM
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If it turns out the drain holes are OK you may have degraded spark plug caps or wires.

Some evening after dark try wetting them down with a spray bottle with the engine running and look for sparks snapping around where they shouldn't....

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post #5 of 13 (permalink) Old 07-15-2019, 09:09 AM Thread Starter
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Thanks, I'll check the drain holes and check the wires tonight
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post #6 of 13 (permalink) Old 07-15-2019, 11:12 AM
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When I had a 1100 it would act up in the rain,I pulled up the rubber cap on the plug wire and filled it with vith sRTV and pushed back over the plug cap,no more issues but assure the hole is clear.

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post #7 of 13 (permalink) Old 07-15-2019, 11:46 AM
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Plug wires are too old.
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post #8 of 13 (permalink) Old 07-15-2019, 01:07 PM
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WD 40 on the plug wires cured my friends 1100 problem on our 86 trip, during a very wet ride in FL.
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post #9 of 13 (permalink) Old 07-15-2019, 04:55 PM
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My money is on "Plug Wires"......!!

I rode a GL1000 for 14 years and never once had the drain holes get plugged up. Never happened to me or several friends riding GL1000.s.

I know it can happen but not necessarily a common thing....!!
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post #10 of 13 (permalink) Old 07-15-2019, 05:34 PM
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Haven't had issue with plug wires (yet) on my 1100 but I did have a couple bad sparkplug caps. They were snapping sparks from the cap to the inside of the recess in the head, got so bad they were snapping sparks even when dry! Replaced all four of them, been good since.
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1972 CL-350 (1980-1988) sold
1978 Suzuki GS-550 (1985-2005) sold
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1980 GL1100 STD Vetter (2005-)
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1983 Trav-Lite Camper (2010-)
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