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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 3.4L Misfire replaced plugs replaced coil P0303 Just reinstalled engine
Reported repair
Use essentially a dentist pick
Reported resolution
1
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 report a fix
1
1 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.
Reported fix · Original poster
I used essentially a dentist pick for cleaning teeth (actually it was a tool I used for replacing key cylinders on E39 BMWs). Pushed the pins back together and solved the problem.
Leading evidence: 'Use essentially a dentist pick' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Use essentially a dentist pick' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Use essentially a dentist pick', supported by resolution reports in 1 discussions. 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 will spare you gents with the complete listing of all that was replaced).
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
As soon as this misfire started happening I just replaced all the coil packs because the car was still on the OEM Set, all the Part Numbers on the coils were 996 602 107 00
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 then I just replaced all of the coils to the 997 revised coil packs so the entire ignition system has a grand total of 300 miles on it.
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 had recently replaced 2 coil packs before due to me thinking I had 2 bad coil packs on Cylinders 1 and 2. Those ended up not being bad so I used one of my old coil packs on Cylinder 3 and that worked for a day or so then crapped out.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Use essentially a dentist pick
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
1 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.
Reported fix · Original poster
I used essentially a dentist pick for cleaning teeth (actually it was a tool I used for replacing key cylinders on E39 BMWs). Pushed the pins back together and solved the problem.
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
As soon as this misfire started happening I just replaced all the coil packs because the car was still on the OEM Set, all the Part Numbers on the coils were 996 602 107 00
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 had recently replaced 2 coil packs before due to me thinking I had 2 bad coil packs on Cylinders 1 and 2. Those ended up not being bad so I used one of my old coil packs on Cylinder 3 and that worked for a day or so then crapped out.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Set all the part numbers
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
As soon as this misfire started happening I just replaced all the coil packs because the car was still on the OEM Set, all the Part Numbers on the coils were 996 602 107 00
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Use essentially a dentist pick
1
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that report a fix
1
1 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.
Reported fix · Original poster
I used essentially a dentist pick for cleaning teeth (actually it was a tool I used for replacing key cylinders on E39 BMWs). Pushed the pins back together and solved the problem.
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.
5 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: 20261026T205155Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello All,
I am new to 996 ownership. I recently bought a 996 with the infamous cracked head problem. Got the head rewelded after reading tons of Dharn's posts about his issue he had with his. While I had the engine out I replaced as much as I could. (I will spare you gents with the complete listing of all that was replaced).
Just got everything back into the car and started driving around and started to get a misfire on Bank 1, Cylinder 3. This after about 400 miles on the car
It through a check engine light and I pulled the code for P0303, as well as P1539 (VarioCam Soleniod Bank 2).
So the misfire has been contained to Bank 1 Cylinder 3.
I recently put in 6 new Beru 14 FGR-6 KQU Spark plugs when I had the engine out. As soon as this misfire started happening I just replaced all the coil packs because the car was still on the OEM Set, all the Part Numbers on the coils were 996 602 107 00
I had recently replaced 2 coil packs before due to me thinking I had 2 bad coil packs on Cylinders 1 and 2. Those ended up not being bad so I used one of my old coil packs on Cylinder 3 and that worked for a day or so then crapped out.
So then I just replaced all of the coils to the 997 revised coil packs so the entire ignition system has a grand total of 300 miles on it.
The car runs beautifully but at higher RPM's under heavy load specifically after a brisk shift I will get a misfire momentarily then it will go away, only in 2nd sometimes but usually in 3rd Gear.
Its been mind boggling to say the least.
I went through and tone tested the grounds in the coil pack harness to the engine case and that shows fine.
I am at a loss, I would greatly appreciate any help you guys could offer, I read through probably 90 other misfire threads at this point before making this thread.
You can swap the coils and spark plugs between cyl 2 and 3 and see. If that still gives you P0303, you may want a compression and leak down test at least on all cylinders in bank 1 so you can compare the numbers. Then fuel injector #3 is next.
Gents,
I found the problem. It was not plugged cats (although that was my next step). It seems that in my efforts to diagnose a different misfire I had earlier I had used a multimeter incorrectly on the Coil Pack Plugs.
Therefore the connector from the engine harness to the actual coil pack on coil 3 the pins were shoved apart far more than usual.
I used essentially a dentist pick for cleaning teeth (actually it was a tool I used for replacing key cylinders on E39 BMWs). Pushed the pins back together and solved the problem.
Thank you for your help.
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