thanks for that.. i noticed that when i have the cycle button on ( the one with the arrow kinda goin in a circle lit up orange) it does not smell really. and the smell is mainly when ive been driving and then stop at a light it then begans to smell, ya almost positive its exhaust no visible leaks or spots on the ground. nothing has been done lately to the engine *its kinda like riding in a vw bug that ghetto gas type smell.. thanks for the help.