Hi all how are you
im having this problem from the beginning of this summer firs you should know that i drive my car 90% in city and i never push it hard but before 2 weeks i fined empty rood so i push the padil to the metal and from that moment i fined that my car have vary bad small when the RPM 5 and over the small like Sulfur then i go to the nearest work shop and i changed the spark plugs and air filters and the small didn't change and now the check engine yellow light came on
one thing i always use 95 octane and some times i use octane bost
in the work shop they advice me to remove the cats ???
so i want you advice PLS
thank you all

 

What country are you in, and how confident are you about the fuel that has been used? As I recall, the sulfur smell may be hydrogen sulfide and may be the result of the level of sulfur in the gasoline. Glynn, your thoughts?

 

im in Jordan and i full up my car only from total
my car have 25K on it

 

I think the first thing I would try is to stop the octane boost. Who knows what is actually in that, and you are already putting in higher octane than necessary or beneficial. Try matching the fuel you buy to what is actually on the label on the fuel filler door from a major brand name station in your country.

 

ok we only have 90% and 95% and both unleaded
do you have any advice on removing the cats ???
and if i remove them is there any problems ????

 

I don't know the answer to that, but removing them is not the answer. You should find out what is causing the problem instead of adding to air pollution. Perhaps your dealer can help figure out what is happening. If you have to use 95, you certainly don't need octane boost and may be contaminating your fuel.