5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHCautionary tale
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unlikely
Reported cause
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Reported cause
My '98 C2 has done 90,000 miles so the problem is unlikely to be caused by low mileage!!
Leading evidence: 'unlikely' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'unlikely' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Repair cost in the end' (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 report identifying a cause
1
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Reported cause · Original poster
After much investigation and frustration over the last year ,it has finally been traced to the variable inlet valve lifters on cylinder 6.
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.
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1
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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.
Porsche Club GB: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Much happened since -new battery ,coil pack ,MAF unit etc but it still did not fix it.
Hello All,
Some time ago I posted several pieces about a mysterious missfire on my 2003 C2 Targa. After much investigation and frustration over the last year ,it has finally been traced to the variable inlet valve lifters on cylinder 6.
I will shorten the story but the problem turned up three weeks after the waranty ran out and the OPC could not diagnose the problem. Much happened since -new battery ,coil pack ,MAF unit etc but it still did not fix it.
The car has been to the local OPC but I also took it to Parr who know what they are doing.
Finaly whilst talking privately to an OPC mechanic, he said -is it fairly low mileage? Yes - 23,000- Is it cylinder 6? Yes ,or a multiple missfire code- Aha, you need new valve lifters on the RH bank ,he said !!
It seems they have done quite a few 996s with this now at the OPCs.
I wrote to Porsche setting out the details of this tale of wow to see what the could offer to put it right bearing in mind it was first recorded by them three weeks after the waranty finnished - NOTHING was there answer. It is just a flook! Turns out that a new man at Parr knows all about this 'non exsitant problem'. They fixed it yesterday ,well I was not going to let an OPC get the money. So beware, I am told -don't use the car for short journies(which I don't).don't leave it for long periods. And if your missfire code shows cylinder 6 then get out your waranty card quickly!
All the best
Blimey, what an absolute gutter! It's a bit worrying for me as I only do about 1,500 mile a year in mine.
I had to start her the other day - just to get her up to temperature and there was a ticking coming from the drivers (right) side bank of cylinders. It was still there when she got to 90 deg C - but I hadn't touched the throttle until then. It then disappeared when I gave the throttle a small blip up to about 3000 RPM. She then idled as normal. I tend to favour a 10/40 oil too, so I do sometimes wonder if that's such a good idea - especially after this has happened.
There's been a lot of posts about the ticking (presumably the hydraulic tappets) that you can get when the engines are cold on these 996's. I get the same on my Merc 190E when I start her cold - but it only lasts about 2 seconds until the oil get up to the head AND she has done 154,000 fault-free miles. My Porsche, on the other hand, has covered just 19,500. I paid £400 for my Merc 3 years ago and slightly more than that for my Porsche! Funny old world, ain't it?
This is interesting, and I note that you replied to my post about the emission light coming on. Did your warning light come on? The misfire on mine seems to be the left hand bank (as you look at the rear of the car) so I am hoping that it is a different problem (unless left is right!!). My '98 C2 has done 90,000 miles so the problem is unlikely to be caused by low mileage!! I am going to book it in for a diagnostic check to find out exactly what is causing the problem.
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