Could anyone narrow down the source of the sulfur smell in my car?

[fizzyBee]

When I pull up to junctions my car is smelling of sulfur/rotton eggs. I've been told the things that can cause it are a blowing exhaust, which it can't be as mines less that 2 months old, bad fuel, a plugged cat or a problem with my battery.

Well my car was serviced only 4 weeks ago and passed its emissions test so I've been advised it's not likely to the the catalytic converter, I was told I possibly need to top up the distilled water or replace the battery but surely if this was needed it would have been done when my car was serviced?

The weather is very hot so it's not likely to be because the cat is cold? I mostly notice it at the start of a jorney and it's gone by the end I think (or I'm used to it). I mostly do only long journeys of half an hour or more but it was at it's worse when I made a short journey recently.

Could anyone narrow down the possible cause?

Thanks for any help! :)

[mjwman]

Well, I can tell you it IS the catalytic converter. It takes a while to bed in though a change of fuel brand might help.
Take it for a good old burn up. That should sort it for a while!

[Nkakamasembe]

Other than for the unpleasant smell its nothing to worry about.You may just have filled up with a batch of fuel with a higher sulpur content .technically its a telltale sign your catalytic converter is either new and or working normally.

[red-forest.]

My sister had this problem with her car a little while back turned out to be the battery,if you have any signs of loss to the acid / distilled water i would think its definitely the battery.

[chas2008]

when cats were first introduced a few years back they were renowned for the eggy smell when new, as times gone on it doesnt seem to affect them anymore must be a change in material or manufacture. I have a compound of 200-300 new Fords/vauxhalls and i cant remember the last time i noticed a cat converter smelling on start up.
As you have had a cat fitted recently this will be the cause of the smell, i may be wrong but it could be caused by an after market cat rather than a main dealers, eventually though the smell should burn off.

[phizzy]

i might be a bit late with this reply but you guys have settled my mind somewhat, i had new cat fitted last tuesday and i thought i was imagining things, the smell just as you described, and it does new seem to be lessening, so thanks to fizzyBee (nearly same name as mine) for posting the question and thanks to the replies you got i'm happier.