I did about 100 miles on the highway today goin to camaro superfest and back. When I filled up on gas after, I noticed some smoke coming from the catalytic converter area. I was coming out behind the passenger front tire. I didn't really notice a smell and it was just regular grey smoke. I was in a hurry to get home so i just kept going and didnt see where it is from.

I also had to do a few errands once i got home so i didnt check it there either.

Anybody have any predicitons as to what was smoking and what i should do, is the cat bad?

I do have a cutout but it is further back and the smoke didnt look like it was coming from it.

 

Its probably an oil leak from the back of the intake manifold dripping down on the exhaust. That'd be my guess. Next time it smokes, take literally 10 seconds and check out whats going on under there.

 

I felt around the back of my intake and there was oil back there. There was also a drop coming off the cat. Im gonna assume that the oil dripped on there and then got burnt off. Im gonna assume that it is the intake leak like you said. Is it for sure 100% the intake leak or is it possible that something else is leaking?

I guess i am going to have to wrap the egr in header wrap, take the intake off, clean it up good and put down a new gasket. Is it possibly anything else and what else should i check?