16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMissfire number 3
Leading reported evidence
Check wiring done a compression
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
Leading evidence: 'Check wiring done a compression' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check wiring done a compression' (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
After the lifters were changed gone were the noises.
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
Replace oil (twice) and also swapped the cam actuators
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
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
When you have a single cylinder misfire (#3 on yours) and all other possibilities have been eliminated ( archaic process of elimination) , then the only thing left to do is replace the intake lifters on #3 cylinder..
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check wiring done a compression
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
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
When you have a single cylinder misfire (#3 on yours) and all other possibilities have been eliminated ( archaic process of elimination) , then the only thing left to do is replace the intake lifters on #3 cylinder..
Replace oil (twice) and also swapped the cam actuators
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
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
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
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.
16 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: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all
new to the group but have used it for research I have a 2001 996 3.6, it has a misfire on cylinder 3 so far I have swapped coils,new plugs, new injector, checked the wiring done a compression test carried out a leak down test changed the oil (twice) and also swapped the cam actuators but still have a misfire at idle only even placed a Noid tester on the injector
if I thrash it down the road all is good for around 15 miles or so at idle then randomly it will start again
any ideas now would be great thanks in advance
Hello, welcome to the forum...
.
Well, what car do you have..?, a 2001 996 is a 3.4, 5 chain not a 3.6, 3 chain as you stated above. Unless you have a Turbo or GT..?
Seems you've done all the normal stuff to solve a misfire, unfortunately with no luck.
Have you got the exact fault codes, they might help shed some light on your problem..?
jmo
hi 124k
full history
only done 10k since 2014 when the IMS was done and other than service not much I can see only just bought it so go stitched up as it happened about a day after I got it as I say give it a good thrash it clears then all good for 15-20 miles
hi 124k
full history
only done 10k since 2014 when the IMS was done and other than service not much I can see only just bought it so go stitched up as it happened about a day after I got it as I say give it a good thrash it clears then all good for 15-20 miles
may just break it as I�m done really it�s taken the fun out of owning one
So, what exactly is a �modified oil feed�? Do you mean a feed to the IMS bearing? If so, that shouldn�t have any relation to a misfire� Misfire should only be related to fuel, spark (maybe a bad wire/connection to ecu), or too much oil in the cylinder (fouled plug�). Good luck!
You forget compression. Often times when a misfire needs to get troubleshot to the end of the line, a cracked head, block or damage to the head gasket are the culprit. These can often be hard to find as the effects are often temp dependent.
This is true! I sort of figured compression was covered by the fouled plug scenario (as in loose rings/oil blow by/scored cylinder�). Head gaskets are rarely an issue in the M96 so was not part of my calculus�Crack head/cylinder could certainly lead to low compression - and we do know this is a thing�
The 3.6 M96/03 engine is well known ( by people who specialize in 996 engines) for misfires caused by sticking two-stage lifters. The intake lifters on the M96/03 engines are the vario-cam + type with a high lift and low lift, there is a pin that switches the high-low, that is operated by oil pressure ( and controlled by the DME+ an electric solenoid)
When you have a single cylinder misfire (#3 on yours) and all other possibilities have been eliminated ( archaic process of elimination) , then the only thing left to do is replace the intake lifters on #3 cylinder..
A lot of times when you have the lifters out in your hand, you can operate them by hand and actually feel the sticking .
Good luck..I know that is not what you wanted to hear, but is the way it is in the world of the Porsche Gods ..
Hi thank you
this is the conclusion I had sort of got too but was hoping someone would put this forward, im an ex Ferrari tech albeit a while ago so not a complete novice, not knowing the product entirely and how it all works is a big disadvantage
I had one of those lifters bugging me also, after a drive when idling the CEL started blinking. Stopped blinking when I raised the RPMs.
Was also very audible if the car had been sitting for long.
Pretty pricey things are those intake side lifters on these 996.2 cars, huh...
