Intermittent backfire


Information and questions on GL1500 Goldwings (1988-2000)
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Shooter560
Posts: 5
Joined: Sun Oct 14, 2018 1:42 pm
Location: United Kingdom
Motorcycle: 1993 Goldwing GL1500 SE

Intermittent backfire

Post by Shooter560 »



Started the bike up today and it developed an intermittent backfire/pop through the exhaust. Tracked it down to the front cylinder on the right. Tried changing the plug 3 times, but it’s still there, pulled cap and pop stopped but obviously running on 5.

Any suggestions as I’m at a loss, and starting to think it’s either a lead or maybe an igniter breaking down



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ct1500
Posts: 1392
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: Intermittent backfire

Post by ct1500 »

Is this present at an idle and higher RPM? I would first do a compression test on the engine. Sounds like a misfire is occurring where an adjacent plug leads spark is jumping to your #1 lead. What was the spark plugs tip condition and for that side of engine white, black and compared to the left side? How well is the engine running otherwise?
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minimac
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Location: Oswego, NY, Leesburg, Fl
Motorcycle: 1993 GL1500 Aspencade
2006 Yamaha Morphous
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Re: Intermittent backfire

Post by minimac »

Could also be a sticky valve.

Shooter560
Posts: 5
Joined: Sun Oct 14, 2018 1:42 pm
Location: United Kingdom
Motorcycle: 1993 Goldwing GL1500 SE

Re: Intermittent backfire

Post by Shooter560 »

Well after a day of pottering, tracing and head scratching I finally sorted it, one of the wires to the top igniter pickup had started to break causing the issue, why it was only affecting cyl 1 I have no idea, but wire cut and soldered and miss fire/pop has gone, it even revs smoother too, so maybe it’s been playing up a while

TwoTone Trike
Posts: 232
Joined: Sat Jul 08, 2017 3:52 am
Location: Mt. Sterling Kentucky
Motorcycle: 1999 Honda GoldWing 1500se/2012 Hannigan Trike, 1953 Panhead, 1973 Electra Glide sold

Re: Intermittent backfire

Post by TwoTone Trike »

Glad you got it figured out.



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