I'm getting a nasty egg/sulfur smell under hard acceleration and during high speeds on the highway.
Dealer says no computer messages.
Suggestions or a corporate #?
2019 nx300

 

Same thing was happening on my ‘06 IS350. Thought it was the catalytic converts going bad. Next tank of gas or two I never noticed it again.
I’d suggest that you run the tank down, get gas at a different station and take it down the highway for awhile.

 

Thanks for the suggestion.
I've tried different gas stations and premium, to no avail.

 

Always use a top tier gas brand and always use the recommended octane. From my experience, I find gulf gas to be more stinky during hard acceleration and Shell V-power to almost eliminate the sulfur smell altogether. The US regulation concerning Sulfur is much more relax than the European regulation, you can say we have cheap dirty gas compare to some other developed countries in the world,

 

I've used Mobile which was the worst offender. Chevron, not as bad. Both premium and regular.
Also BJ's.
I'll run a couple of tanks of premium and go from there.
Thank you

 

If the catalytic converter is working correctly, then he smell is usually caused by the gasoline brand or low octane. It can take five fill ups to clean out the smell from a catalytic converter. I would run the gas tank down to just under 1/4, switch the brand and gasoline grade to a higher octane. The higher the octane the hotter and cleaner the gas burns. Lower octane can also cause a incomplete combustion cycle or cause carbon build up in the valves.

 

I had thought and read the computer would adjust for the octane. Also, asked folks with this car the grade of of gas they used, all said regular and never high octane.

I always drive conservative on the pedal. Is is suggested to hard accelerate a bit, letting the turbo kick in?

 

Hard acceleration is usually makes the sulfur smell worst, the turbo kicks in at 2000 rpm.

The computer does adjust timing for the low octane gas but it has to detect knocking first. Since your car is design for 91 octane, when using 87 octane, it will initially retard timing, then it will slowly try to advance the timing until the computer detect a slight knock, you will not hear it or feel it, once knocking is detected, then the computer wIll retard timing until knocking stops and this cycle will repeat itself in a loop. This loop will dirty up your engine and possibly cause your smell.

 

Thanks for the detailed response.