Smoking Hyundai

[quote:c34df8998a="cindyyc"]I have a 2001 Hyundai Sante Fe (4 cylinder). It has 127,000 miles on it. It recently started smoking from the tail pipe. It leaves a black residue in the muffler. What could the problem be? It seems to smoke more as I sit idle at stop lights. Please help.
cindyyc[/quote:c34df8998a]

The check engine light is it coming On? What is the color of the smoke?

The check engine light has been on ever since I first purchased the vehicle 5 years ago. The smoke is black I think. It's hard to tell.

[quote:c1ae265b02="cindyyc"]The check engine light has been on ever since I first purchased the vehicle 5 years ago. The smoke is black I think. It's hard to tell.[/quote:c1ae265b02]

For a start have your coolant temperature and oxygen sensors check