Hello🙋🏻♂️.
I drive a manual Suzuki Swift model 2005 1.5L Petrol engine that has done 180K kms. The car was driving smooth till a month ago i started smelling a disgusting smell coming out of the exhaust only while reving when i do reverse parking which is every single day!! I really didn’t care about but eventually it became annoying so i jumped on google and that’s when my wallet started crying i read about catalytic converters and how expensive they are to replace. So i called a mechanic and explained to him he said it could be the fuel “cause there’s no check engine light on” so i changed from 95 unleaded petrol to 98 unleaded. I also added Liqui molly full fuel system cleaner to the fuel tank. Now after a week of driving it the smell only comes once or twice a week while reversing. The thing is there are no lights on the dashboard and the car is driving smooth it hasn’t lost any power at all! The only problem the car has is a slipping clutch that I’m changing next week but I really need to know if the catalytic converter is a possibility or it’s something else and I’m scared and broke to fix that now. If there’s anyone who can answer my questions please help a brother out🤝 Thank you!
"Rotten Egg" (or sulfur) like smell is a common smell when catalytic converters are aging and having a difficult time "cleaning" the air. The converter include a ceramic honeycomb coated with platinum or platinum-like metal such as palladium or rhodium. As the Converter ages, the "coating" becomes less effective (wear & tear), gases coating the "active" metal coatings so that the chemical reaction is less effective and/or cannot occur (coupled with possible clogging of the honeycomb) and chemical reaction becomes worse. Now, if a car is running richer (more fuel due to dirty injectors, vacuum leaks, bad spark plugs, etc.) then the Catalytic will clog / coat sooner. This said, what can you do? Well, generally at this point you should replace the catalytic converter. You can try fuel cleaners (that are supposed to be "Catalytic Safe" but that likely will not resolve the issue). Now, I myself have successfully cleaned catalytic converter (on several Cat. conv. but I had to remove them from the car, and use a hose attached to hot water heater / tank with max hot water and wrapped an old towel on one end, I flushed the cat for about 5 min in each direction (No chemicals or soap!). This effectively cleaned the converter and when I reinstalled, the smell was gone and has lasted years. (mileage my vary). Or, if that's not an option then purchase a used cat from say Pick n Pull, flush it as noted above then install it (with new gaskets of course). Or if this is not an option, then try to live with the smell until you can replace / flush it. Lastly, you could remove it all together (if it's not a legal requirement for licensing, etc.). Regardless, make sure your car is tuned up and clean the injectors too (I like using BG 44K) Cat. safe cleaner.
Unfortunately chances are it is coming from the catalytic converter. If you can stand the smell I would just love with it myself.
"Rotten Egg" (or sulfur) like smell is a common smell when catalytic converters are aging and having a difficult time "cleaning" the air. The converter include a ceramic honeycomb coated with platinum or platinum-like metal such as palladium or rhodium. As the Converter ages, the "coating" becomes less effective (wear & tear), gases coating the "active" metal coatings so that the chemical reaction is less effective and/or cannot occur (coupled with possible clogging of the honeycomb) and chemical reaction becomes worse. Now, if a car is running richer (more fuel due to dirty injectors, vacuum leaks, bad spark plugs, etc.) then the Catalytic will clog / coat sooner. This said, what can you do? Well, generally at this point you should replace the catalytic converter. You can try fuel cleaners (that are supposed to be "Catalytic Safe" but that likely will not resolve the issue). Now, I myself have successfully cleaned catalytic converter (on several Cat. conv. but I had to remove them from the car, and use a hose attached to hot water heater / tank with max hot water and wrapped an old towel on one end, I flushed the cat for about 5 min in each direction (No chemicals or soap!). This effectively cleaned the converter and when I reinstalled, the smell was gone and has lasted years. (mileage my vary). Or, if that's not an option then purchase a used cat from say Pick n Pull, flush it as noted above then install it (with new gaskets of course). Or if this is not an option, then try to live with the smell until you can replace / flush it. Lastly, you could remove it all together (if it's not a legal requirement for licensing, etc.). Regardless, make sure your car is tuned up and clean the injectors too (I like using BG 44K) Cat. safe cleaner.
I suspect the clutch. Change it and see if smell goes away.
The clutch isn't going to emit the sulfur smell.
@billybob and other downvoters
I do not state it emits suplhur smell.
I SUSPECT the slipping clutch causes issues with catalytic converter (not directly because they are not phisically connected).
nonsense