99 FLHTC Problem When Hot
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Novice
Joined: Jul 2021
Posts: 23
Likes: 4
From: CONNECTICUT
Wow, This is all great info, Thank You!
I was out the other day on the bike, left it idling before I went out got a mile down the road, turned around to head home and the engine quick, when I turned the engine off and back on my check engine came on, went out and they flashed a couple of times. The bike started right up and when put it in gear and took off the engine light came and the engine began to quit, I revved it a few times engine light went out, went a couple 200 yard same thing. It will back fire from time to time as well.
When I got home I put a spark tester while it was hot and both cylinders have spark. I did notice that the plug wire on the rear cylinder was really hot, almost to hot to touch. I also noticed that the plug wire doesn't snap onto the plug like the front wire and the slightest tug on it take sit off.
I was out the other day on the bike, left it idling before I went out got a mile down the road, turned around to head home and the engine quick, when I turned the engine off and back on my check engine came on, went out and they flashed a couple of times. The bike started right up and when put it in gear and took off the engine light came and the engine began to quit, I revved it a few times engine light went out, went a couple 200 yard same thing. It will back fire from time to time as well.
When I got home I put a spark tester while it was hot and both cylinders have spark. I did notice that the plug wire on the rear cylinder was really hot, almost to hot to touch. I also noticed that the plug wire doesn't snap onto the plug like the front wire and the slightest tug on it take sit off.
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,252
Likes: 3,679
From: backwoods
Try changing the big main fuse. The older bikes had problem with them, so dealers cure was to installed a bigger fuse. I did on my old '05 Road king and never had the problem again. The other thing to look at is the coil. They have a habit of crapping out when they get old. They don't like heat.,,,
His bike has breaker. Swapping fuse did nothing I suspect other than reseat or knock some corrosion off
You can pull some codes for m dash by holding trip button and then turning bike off.
Cam sensors went away 2000 or 2001, I can't remember if carbs had them. If they did, I think aftermarket ignitions may have had a way to delete.
edit
If rear plug wire is hot replace. It should snap in.
It is good to replace periodically anyways
Last edited by Rounders; Jun 11, 2025 at 01:39 PM.
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