AO Silver Member
Join Date: Nov 2003
Location: United Kingdom
County: Perth and Kinross
Re: Catalytic Converter
The rotten egg smell is sulphur in the fuel. This smell can be quite strong under certain conditions. If low grade fuel is used, it may have a higher sulphur content. Petrol should really be low sulphur to avoid acid rain issues these days. Then again, most fuels have the same base, so that is perhaps unlikely. The second could be operating conditions. A lot of stop start driving, short runs, and town running will prevent the cats from reaching 'light-up' temperature whereby they actually work. This will coat the cat innards with unburnt contaminants. In that case, the only way to stop this is to make sure the cat gets hot enough. That is by driving quicker and longer.
Your JTS will have pre and post cat oxygen sensors, and the management system will let you know if a cat has failed by illuminating the managment system malfunction lamp.
[SIGPIC][/SIGPIC]Drive sideways- life's too short not to
Slip-sliding my way through winter. On four wheels and two.