CAR IS MAKING CLUNKING SOUND AND SMELLS LIKE ROTTEN EGGS
2002 Renault Scenic
Car was running well, no warning lights nothing. Went to drive it on friday, there was ajuddering, a clunking sound and a smell like rotten eggs. Help
Saturday, June 9th, 2012 AT 3:23 PM
That sounds like the catalytic converter has rotted internally and collapsed in on itself. It needs to be replaced. Try tapping it with hand or rubber mallet to listen for loose material to check it for sure.