I know I may have an exhaust leak allowing this smell into the car but I'm more concerned with why the odor is there at all. It seems almost sweet, not really a rotten egg smell. I'm thinking catalytic converter but it just passed emissions inspection with no problem.

 

sweet smells indicate burning coolant. pull your spark plugs out and look for a white coating on them. check all of them, yes.

we need to make sure you don't have a blown head gasket.

 

Spark plugs were just changed. I was surprised how good they all looked.

 

I'm not worried about them being bad, it's just a simple easy test to ensure that you aren't burning coolant. there will be white deposited crap all over the electrodes if you are. otherwise, it's all good.

 

They looked good meant no deposits. This has been going on for a while.