My 2008 truck suddenly has a rough idol and a sulfur smell. I'm thinking catalytic converter. Apparently mine has two of them. How do I know if it is the problem? I'm afraid to drive it far. The nearest Auto parts place is 20 miles away.

 

What motor, Miles on motor and when was the last tune-up ? Pretty sure if you smell sulfur you have a clogged cat. Check engine light on ?