Hey fellas. Hopefully someone can shed some insight to this issue. A few months back my friends noticed my car was barely smoking at an idle. But couldn't see it smoking when driving.

I didn't put to much concern into it. When the time comes it needs fixed, I'll fix it.

About 2 weeks later, my brand new catalytic converter blew up. The insides came apart and were plugging my exhaust. I removed the cat, punched everything out of the inside, and put the cat back on. My car doesn't have a muffler so it's technically "straight piped" now.

About 2 weeks after that I noticed the smoking was getting worse at an idle, and when stopping at a red light I can see the smoke when I look out my window. It smells like really bad exhaust leak and is almost transparent. It's not dark enough to tell what color it really is but doesn't smell like oil.

I compression checked all cylinders. They all came up 210psi. Plugs look great, no signs of oil. I replaced my plugs and wires and still smoking. Don't notice antifreeze loss or oil loss, or fuel consumption from too much gas. The car runs great. No check engine light. I've cleaned my intake and throttle body, still no help.

Anyone got any ideas?

Edit: it is a 420A w/ 5 speed.