Rear spark plug carbon build up
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Stage III
Joined: Sep 2022
Posts: 3
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From: Salt Lake City
Rear spark plug carbon build up
I have a 2002 Fatboy and was up riding in the black hills and heading down the highway to another road house when bike starting bucking and chucking. Pulled over and bike sounded as if running on one cylinder. Pulled both plugs and rear plug was black with carbon buildup, front was correct color. Removed air cleaner and filter was dirty. Put in new spark plug, kept filter off since I couldn't clean it, started bike and same bucking and engine died when idling, pulled new plug and carbon build up in just those few mins. I was thinking might have a bad injector since I had spark. Pulled injectors, ohms were 15.8-16 on both. Cleaned injectors but neither seemed clogged on initial blow out, any suggestions???
