this can happen on car where the cat dosen't have enough time to warm up, or if somone is always driving like a grandma. So in short, just don't take your car on so many 'to the corner' trips, your cat gets a buildup on it I think its hydrogen sulfate like haljensen said. I know when I got my acura for the first 2 months or so whenever I would drive the car hard I would get that smell, so whoever owned it before didn't drive to too hard. The solution ... always drive you car hard
2013 Scion FR-S 6MT - Ultramarine
1995 M3 Coupe MT - the "Bavarian Bumblebee"
1994 Integra - Sold | 2005 Dodge SRT-4 - Totaled by Hail
| 1997 Acura 2.2 CL slowmobile - Sold | 1991 BMW E30 - Sold | 1991 Acura Integra GS - Wrecked | 1971 Chevy C-10 shortbed stepside - Sold | 1973 Camaro Z-28 Clone - Stolen
Friends don't let friends drive Ford's!