11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHelp troubleshooting bad spark plug
Leading reported evidence
Replace coils and plugs
Performed · outcome unconfirmed
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
So, I changed the coils and plugs on one side, started the car and everything ran fine.
Leading evidence: 'Replace coils and plugs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check header' (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.
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
I used my hand and figured it was cylinder 1. I put the stock coil back in and it worked.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Check header
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.
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
I'd go with an ir thermometer for checking the manifold to see which cylinder is cold.
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
I had the same problem in my BMW after changing the plugs.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
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.
11 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 · 1 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T091943Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
So, I changed the coils and plugs on one side, started the car and everything ran fine. Did the same for the other side and one of the new plugs/ packs isn't firing.
Without going through the process of elimation by swapping the old parts back in one cylinder at a time, is there a secret? Would an OBDII reading tell me which cylinder is misfiring?
I went though and removed then reseated all plugs, coils and connections. I heard the snap on all three coils telling me the connectors were seated.
OBD will tell you the cylinder that is misfiring. For example: P0301-P0306 - misfire, cylinders 1-6. Once you have scanned and recorded code(s), if your OBD-II reader doesn't define them, Google will.
Or if you don't have an OBD tester ...
From cold, run the engine for 5-10 seconds and then (carefully) feel the header - the cold one is the one not firing..... If you don't want to try your fingers, run the car a little longer and brush on some water and see which cylinders evaporate.
I had the same problem in my BMW after changing the plugs. It was a bad coil extension. Confirmed it by noting the first misfire cylinder and moved the coil extension, fired it up and read the error and it had moved. Process of elimination.
Good suggestion on checking the header. I used my hand and figured it was cylinder 1. I put the stock coil back in and it worked. I also borrowed my friends ODBII reader. Confirmed.
I'll be honest, this was my first intrusive work on a Porsche. I think I spent more time looking at the quality construction and admiring the beauty that is.
In two weeks I am dropping the transmission for a new clutch, IMS, RMS job. Time to get serious.
