I installed a catless downpipe like three weeks ago.

I get a steady white smoke from the tail pipe at idle, but only after the car is driven to operating temperature.

27K miles. I don't think it's coolant, I took off the valve cover and there was nothing in there they looked frothy etc.

Any ideas? It it just not having the cat? The smoke seems way to excessive for it to just be from removing one cat. It will fog up the outside.

 

Stumbled on some thread on here.

Apparently it was my Oil Catch can and Puegot PCV delete.

I removed them. No smoke at all. From thick smoke so zero smoke.

 

I've seen posts where this can happen with an OCC and PCV delete, especially when the weather is cool. Mine does the same thing in the cooler months.

Definitely annoying. Might revert mine as well.

Do you have the link you found?