Join Date: Jun 2018
Location: Sumter, SC
Model: Goldwing GL1500 Aspencade
Well crap! I'm a little pissed right now. I took the bike out yesterday to have dinner with the family and it ran beautifully! Upon returning, again it rode beautiful. But I decided to remove the superbrace front fork plate I installed last week because the front was riding a bit stiff; I felt nearly every ripple or imperfection from the road. So I came home, placed the Goldwing on its rear stand, made the changes, and rolled the bike back onto the ground. Started the bike and it struggled as it usually did before replacing the plugs, whereas the bike would fire right up without throttling after I replaced the plugs. Took the bike out for another spin to test the front forks, and damn it if the bike didn't start jerking again under load. Thinking maybe I didn't give the bike a chance to warm up yet, I rode a few miles and throttled it again under load, and AGAIN it started jerking!
Okay so why would the bike run good for about 20 miles with brand new plugs, and then start to run like crap again after bouncing the bike back onto the ground from its jack stand? This is definitely an ignition issue of some kind. Could it be the wiring harness that might have a weak connection and I probably jerked it loose? I know that the wiring harness that sits atop of the right cooling fan caused problems before. Does anyone know if the coil pack electrical supply comes off the harness attached to the right cooling fan on top?
This might also be indicative of a bad spark plug wire; there is one that is stretched kind of tight. But I'm leaning more towards a bad connection to the coils, or a weak coil. Seems that the new plugs gave the engine new temporary life with a slightly stronger spark. But perhaps the coils are not putting out enough heat. Since the jerking occurs with either the hotter or colder plugs, it cannot therefore be a plug issue, but has to be one of the only 3 things left:
1. Bad wire connection somewhere limiting voltage to the coil
2. Bad coil
3. Weak plug wires
At least I know I'm headed in the right direction since this is happening with both the old and the new plugs. The old plugs were the hotter plugs (now that I've been corrected on the NKG number), and the new plugs are the cooler ones, and yet the bike is misfiring again.
Damn it! I knew I counted my chickens too soon. I think I'll just replace the coils AND the damn wires. And if that doesn't fix it, then it's got to be a electrical harness issue. Right now, I'm thinking weak coil.