Check to make sure it is from the motor and not a heat shield on the exhaust. Also, check for loose items under the hood as well and tap on the exhaust system to make sure the insides of the catalytic converter isn't loose.
Jan 17, 2011 at 4:23 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.