13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCEL + Gas Smell + Popping + Shaking
Reported or suspected cause
located
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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 identifying a cause
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.
Reported cause
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
Leading evidence: 'located' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'located' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Clean then start spending money' (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 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
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
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
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
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 would suggest doing more diagnosis/investigation before maintenance/repair attempts.
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
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
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
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
located
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that report identifying a cause
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.
Reported cause
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
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.
13 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: 20261027T175704Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey all...had my 04 Carrera Cab for about 2 months now. Had been running great but while returning home today all of the sudden I could tell a difference in sound. CEL came on and then I noticed the car seemed to shake a little bit. Wasn't driving hard at the time (in fact, I was stopped at a light and had just started to go to turn right). Haven't checked the codes yet (will do so tomorrow) but curious if anyone might have some ideas as to what might be happening? Attaching a short audio clip with the start up / rev so you can hear it. The gas smell is coming from the driver's side exhaust and that exhaust also seems to be what is causing the vibration in the car.
Any guidance here is greatly appreciated!
What???
No service history, no mileage, no recent work done on the car, no code(s)....and then out of the blue "hey guys, my car is throwing a code and shaking"
Ummmm...okay, putting on my magic hat....it's bad coils and spark plugs.....no....wait...your gas cap is loose...no....wait..your oil filler pipe is cracked...no...wait...your ISMB is seizing...no wait...
WTH
I agree with Joe. We need more information, especially what codes are being thrown. Misfires are one thing, but something may be causing the noise I hear in your audio recording. That mechanical clanking noise does NOT sound good. I wouldn't keep restarting the engine until you get us the codes. You could have some serious mechanical trama going on in the engine.
Also, drop the sump and take a picture of any debris. Looking at the filter media is NOT enough, you MUST drop that sump. Post a picture and we'll be able to give you a better idea of the problem.
Well, that was the point of the post asking for "guidance", not a magic hat definitive diagnosis. I'm a newbie to all of this (my other car is a 68 Camaro so obviously entirely different). I know what to do for that car, I'm still learning on this one - which is why I joined this forum and ask questions.
Give us the CEL code(s) and we will be happy to speculate after that. But understand also that some service history, mileage, recent work, other problems and so on would help a lot.
Fair enough. So, there is only one code and it is a P0306 (cylinder 6 misfire). Mileage on the car is right at 29,000 and although I haven't had any major work done on the vehicle since I haven't had it very long, I have replaced the ignition switch and the light switch (pretty straight forward jobs and I completed them about a month ago). The dealer I bought it from did some work in May of this year that included evaporative emissions vent purge valve replacement, fuel pump replacement, and fuel level sending unit replacement. Based on everything I've gathered so far about ignition coils (typically replaced at 30k miles but on older cars w/ low mileage they are likely still the original ones prone to cracking/decay) and the misfire code, it seems to make sense it would be the coils and if nothing else they are due for a replacement anyway.
With a P0306 code that is exactly where to start - replace all the spark plugs and coils. There are new, upgraded coil packs. Also, since the new coil packs are larger, you need to find a way to space out the heat shields by about 5 mm. Good luck! Note - buy from a reputable dealer and make sure the spark plugs are the correct ones for your engine. AutoAtlanta is a good source for looking up part numbers and getting exactly what you need.
What b3freak said.
The easiest and cheapest is to drop the sump and look for debris. If its clean then start spending money on things. If it's not then you should address that before doing anything else.
I would suggest doing more diagnosis/investigation before maintenance/repair attempts.
Since you know the problem is located on cyl 6, remove the coil and plug on cyl 6 and inspect the coil for cracking and inspect the plug for oil foul or carbon foul.
Test compression on cyl 6 and if low test cyl leak down.
I wouldn't want to alarm you by telling my reasoning for the further testing/investigation, but it is always OK to test things for certainty..
Good morning all...so for this one, I called in some reinforcements. Mostly because this was the first time for me doing any of this kind of work on a Porsche, I wanted to "shadow" someone who had familiarity working underneath the car. Anyway, the tech made a garage call and long story short after looking over everything and testing things out it indeed was the ignition coil on cylinder 6. Replaced with a Beru coil and a Bosch plug and she's back in functional order. Will plan to get under there myself and replace 1,2,3,4 & 5 coils/plugs here soon.
