Rotten egg smell
Discussion
Does anyone know what the cause of the rotten egg smell could be? I bought a Porsche 997 c4s PDK 2009 plate with 6500 miles on clock. Drives perfectly, no idling, no performance issues. Notice when I start up the car. It's intermittent.....
No wise cracks about fart smells, eat less cabbage, etc etc... Heard it all!
No wise cracks about fart smells, eat less cabbage, etc etc... Heard it all!
Manicci said:
Does anyone know what the cause of the rotten egg smell could be? I bought a Porsche 997 c4s PDK 2009 plate with 6500 miles on clock. Drives perfectly, no idling, no performance issues. Notice when I start up the car. It's intermittent.....
No wise cracks about fart smells, eat less cabbage, etc etc... Heard it all!
This arises from the converters that get off on the wrong foot, chemically speaking.No wise cracks about fart smells, eat less cabbage, etc etc... Heard it all!
If this happens frequently, I would question the brand of gasoline you are using, or its freshness.
Sincerely,
Rockster.
Jmracing66 said:
If its coming through the vents then get your aircon regassed with the anti bacterial additive they put into it.
No point putting any anti bacterial material in the gas, or re-gassing. If the smell were from the air con, it would be the outside of the condenser and filter that would need attentionStefluc said:
No expert but normally a smell like that is from the catylitic converter
I agree with this. The rotten egg smell from the exhaust was quite common in the early days of cats (very late 80's) but I can't say I've noticed it on any cars in the last 10 years or so. But that would be the first place I would look.Sorry to venture into this thread with no Porsche knowledge but.....
With the Aston Martins, Lotus' etc that used to get this we 99% of the time could over-come it with the following:
Run until near enough on fumes, then fill with V-Power/ momentum or similar high octane fuel.
Then get the car hot. Hard acceleration and high(er) RPM over a longer period so maybe for you 4th gear at 60-70mph maybe 5-6k rpm?
You'll find a build up of condensation can cause the honeycomb internals of the catalyst to build up with something similar to mould. We had one cut open to show us this on a training course.
Basically getting this literally red hot will help clear it properly and hopefully rid you of the smell.
We found an hour drive or so at these speeds etc would sort it.
I hope this helps
Best of luck!
Tim.
With the Aston Martins, Lotus' etc that used to get this we 99% of the time could over-come it with the following:
Run until near enough on fumes, then fill with V-Power/ momentum or similar high octane fuel.
Then get the car hot. Hard acceleration and high(er) RPM over a longer period so maybe for you 4th gear at 60-70mph maybe 5-6k rpm?
You'll find a build up of condensation can cause the honeycomb internals of the catalyst to build up with something similar to mould. We had one cut open to show us this on a training course.
Basically getting this literally red hot will help clear it properly and hopefully rid you of the smell.
We found an hour drive or so at these speeds etc would sort it.
I hope this helps
Best of luck!
Tim.
Did you manage to cure the rotten eggs smell?
My Cayman has just started with the same problem.
It does smell exactly like the old cat converter and first revealed its presence after being parked up for a week.
Now I find it's intermittent.
The suggestion of mould build up is possible as I live in Malaysia where the humidity is very high.
If the problem was solved how did you do it?
The suggestion of a long drive at high revs might do the trick, did you try it?
I'd be grateful for any suggestions.
Cheers
My Cayman has just started with the same problem.
It does smell exactly like the old cat converter and first revealed its presence after being parked up for a week.
Now I find it's intermittent.
The suggestion of mould build up is possible as I live in Malaysia where the humidity is very high.
If the problem was solved how did you do it?
The suggestion of a long drive at high revs might do the trick, did you try it?
I'd be grateful for any suggestions.
Cheers
As others have said, if the smell is obvious inside the car then I would suspect bacteria in the air conditioning, it's quite common.
Is the smell still apparent with the air con off?
Garages can cure it using a disinfectant. They basically place a special smoke bomb in the car and run the air con on full recirculation for a period of time. I wouldn't have thought it would be an expensive thing to have done as a process of elimination.
Is the smell still apparent with the air con off?
Garages can cure it using a disinfectant. They basically place a special smoke bomb in the car and run the air con on full recirculation for a period of time. I wouldn't have thought it would be an expensive thing to have done as a process of elimination.
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