2003 Lexus GX470 Engine problems

When hard accelerating sulfur smell enters cabin makes me nauseated... Wonder if carbon monoxide is entering cabin also . When stopping or stopped drive shaft bumps hard like someone hitting back of vehicle. *Jb

My suv when ever going up or down a hill at any speed lets out a horrible smell. I took it to the dealer and they claimed it was bad gas, I let the tank run to empty and switched gas dealers...The problem got worse. My son cannot ride in the back seat because he feels like throwing up even during short rides.*Ak

Whenever giving the vehicle moderate to high acceleration, a rotten egg smell comes out of the air conditioner vents. The smell is so bad that it makes me dizzy. *Ak

Whenever giving the vehicle moderate to high acceleration, a rotten egg smell comes out of the air conditioner vents. The smell is so bad that it makes me dizzy and I feel like vomiting. I've been told by the lexus dealer that this is a "normal characteristic of the vehicle" because of the sulfur content in fuel. I have owned several different models of lexus vehicles in the past and never had this problem. *La

A sulfur odor or rotten egg odor, is present in the car when accelerating. I complained about the smell at my 1,000 mile check up and was told that the smell would be gone by my 5,000 mile check up. The car still has the odor at the 5,000 mile check up. Now I'm told by the dealer "sulfur smell has not been uncommon due to high sulfur contents in recent fuel production. Nothing wrong with car, suggest using different fuel supplier." I tried switching gasolines and it doesn't make a difference. Lexus says that...

While driving at any speed the vents spew out a horrible sulfur odor. The odor is so bad that the windows have to be rolled down. Consumer's 14 month old child rides in vehicle. The manufacturer and the dealer have been informed of the problem.*Ak

While driving 45mph car cut off, causing loss of power steering.*Ak