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Discussion summary
YOUR RESEARCHPossible engine problems on 996 3.4L, HELP...
Leading reported evidence
Check light
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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1
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Suggestion · Original poster
I was 100 Kilometers from home and take the risk to bring the car with the check light on.
Leading evidence: 'Check light' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check light' (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.
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Suggestion · Original poster
I stopped immediatly let the engine cool down and re-start the engine , the check light remain on.
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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Suggestion · Original poster
I forgot to mention a detail, when I made the first ride after the check light went on, to I steped on the gas in 2�gear (with the light already on) and the light started to blink again.
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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Suggestion · Original poster
I started the day with half tank gas and was running hard during the morning,enginer was running great.
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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Suggestion · Original poster
On the highway in 6gear , engine was running stronge but when it reached 3500rpm , the vibration starts, so I made all the trip back home under 3000rpm.
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 forgot to mention a detail, when I made the first ride after the check light went on, to I steped on the gas in 2�gear (with the light already on) and the light started to blink again.
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
On the highway in 6gear , engine was running stronge but when it reached 3500rpm , the vibration starts, so I made all the trip back home under 3000rpm.
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.
12 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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi evevybody. I surf this for years and it�s a shame that only now I�m posting something.
I�ve a 996 3.4L Carrera 2 and love it since day one.
Today I�ve benn at the track with my car and at the end of the day something strange happened. I�ll tell the all story.
I started the day with half tank gas and was running hard during the morning,enginer was running great. My car has the PSE. On the main straight I could pass on power a 996 3.6L Carrera 4S which surprised me alot. The 993 C4S was even easier to pass on the main strainght too. Begining afternoon I was out of gas so I went to a place nearby and put half tank for the rest of the day. After two laps on the circuit with the new gas (also 98ron) and after making two hard left corners in second gear check engine light started to blink and than remain on. The engine lost a bit of power and even the oil red light blink for two seconds or so and than went off. I stopped immediatly let the engine cool down and re-start the engine , the check light remain on. Engine is running normal at idle and if I accelarate I feel a noticlble vibration coming from the engine at 3500 rpm up, but from 800 to 35000rpm there�s no vibration at all and no strange sounds either. I took the car for a short ride and the engine was running stronge till 3500rpm, after that it clearly doesn�t have the same power and vibrates. There�s no clicking on metalic noise coming from the engine, just a stronge vibration.
I was 100 Kilometers from home and take the risk to bring the car with the check light on. On the highway in 6gear , engine was running stronge but when it reached 3500rpm , the vibration starts, so I made all the trip back home under 3000rpm.
During my way home I put some more gas in another station, but nothing changed.
Can this be a problem with the catalic converters or have I damage something inside the engine?
Can the vario can system be damaged?
Did I toast my engine?
I really don�t think the engine is toasted, there no leaks, water and oil pressure gauges are working at normal temperatures, no withe or black smoke coming from the exhaust and at idle the engine works fine.
What the hell happened in order to cause the vibration and lack of power????? Please give me your thoughts on this.
Monday I�ll take it to my dealer, but till then, I wont be able to sleep, thinking on the worst cenarios like a new engine
PS - Sorry for the bad English, but it�s not my mother linguage. Thanks in advance.
I doubt it is anything serious. It may even be bad gas, clogged filter which will starve the engine at higher RPM's. When you run the tank very low, any crap in the bottom of the tank has a better chance of getting into the fuel system, but will be stopped by the filter. If you have a scanner, see what code was set. Or go to autozone and have them read the code for you.
That�what I first thougth, but the vibration is too strong only to be a dirty fuel filter. Went to the car and try the engine again, the vibration fades a bit after 5500 rpm but still vibrates. And notive a metalic noise at low rpm while accelerating coming from the bottom of the engine, on the exhaust area. Can this something related with the PSE ?
Is this something serious? Do they need to open the engine to check it?
I forgot to mention a detail, when I made the first ride after the check light went on, to I steped on the gas in 2�gear (with the light already on) and the light started to blink again. Can a faulty catalic converter be responsable for this symptoms? Is there any stories of faulty vario cam system? What are the symptoms? Sorry for all this doubts, but I�m trying to fugure out what the hell happened.
We can sit here all day GUESSING. Go to autozone and get the codes read and report back. It could be anything including motor mounts, valves, pistons, cam, crank, tranny loose seat etc etc etc.
sorry to hear... that sucks..
probably your VarioCam system... I know of somebody who had it "go" on him at the track.... yes they have to open up the motor for this; but you'd best be sure and have a good shop check out the codes and stuff - and stop driving it until you figure out what happened.
P.
I went through 5 MAF sensors so far. When the last one went bad, the car was shaking like the engine was going to blow up. I thought my car was done... You may want to unplug the MAF sensor and see if it acts the same. It will generate a CEL fault that any dealer can reset, but at least you'll know if that is the problem.
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