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Replace spark plug on a bad ignition coil?

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8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHReplace spark plug on a bad ignition coil?

Reported or suspected cause

ignition coils

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause · Original poster

Still running rough after the maintenance and I suspect a bad ignition coil.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?
Frequently discussed work

Check perimary and secondary resistance

No successful repair reported for this finding.

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Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You could check the perimary and secondary resistance on the coil just to make sure before you change it.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?
Read full discussion summary

Leading evidence: 'ignition coils' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'ignition coils' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check perimary and secondary resistance' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

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1 matching discussions · 8 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Check perimary and secondary resistance

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You could check the perimary and secondary resistance on the coil just to make sure before you change it.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace coil first

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Change the coil first, then move to the plug if needed.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace ignition coils

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

At the very least, I shouldn't need to replace the plugs on the good coils even if I replace the coils.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace plug later

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I'd rather pay the few bucks then have change the plug later.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?
Frequently discussed actions (6)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check perimary and secondary resistance

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

You could check the perimary and secondary resistance on the coil just to make sure before you change it.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace coil first

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion

Change the coil first, then move to the plug if needed.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace ignition coils

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

At the very least, I shouldn't need to replace the plugs on the good coils even if I replace the coils.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace plug later

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I'd rather pay the few bucks then have change the plug later.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Replace plugs

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

At the very least, I shouldn't need to replace the plugs on the good coils even if I replace the coils.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?

Test resistance

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion · Original poster

I see some people baking the coils prior to testing resistance.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

ignition coils

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suspected cause · Original poster

Still running rough after the maintenance and I suspect a bad ignition coil.

Original post Read captured discussion
Replace spark plug on a bad ignition coil?
Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Rennlist: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T065735Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Not for the 996, but I can't find a clear answer elsewhere and you guys are really knowledgeable. Sorry if it's a dumb question. Can I reuse the spark plug off a bad ignition coil? Bike was running rough when warm and was overdue for a tune-up. Still running rough after the maintenance and I suspect a bad ignition coil. Smells really rich and there's some misfiring. There's ~50 miles on the new plugs with the bad coil (if I'm right).

POST 3Original post

If the coil and plug were together a long time, then my choice would be to do them both at the same time...in fact do them all.

POST 4 / ORIGINAL POSTEROriginal post

Quotes source posts: 14086567, 14086576

hahaha, I'll take that as a no. Do all the ignition coils and plugs? My understanding is that these rarely fail and I should just replace as necessary. At the very least, I shouldn't need to replace the plugs on the good coils even if I replace the coils.

POST 5Original post

The only negative consequence to the plug should only be exposure to unburned fuel. Change the coil first, then move to the plug if needed.

POST 6Original post

You could check the perimary and secondary resistance on the coil just to make sure before you change it.

POST 7 / ORIGINAL POSTEROriginal post

I'm gonna change it. I'd rather pay the few bucks then have change the plug later. On the bike, I have to remove a steering damper, seat, fuel tank, air intake tubes, and air box before I can get to the coils and plugs. And I strained my neck yanking out the coils last time. I was only going to keep the plug if the unequivocal response is don't worry about it. Thanks everyone.

POST 8 / ORIGINAL POSTEROriginal post

Dang it. Resistance readings seem within spec, but my bike runs fine at cold temps. It's only stalling at normal temps. I see some people baking the coils prior to testing resistance. Nonsense?

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