Why does your rx7 smoke at startup?

If your RX-7 is smoking at startup, it could be due to a few reasons. Common causes include oil leaking into the combustion chamber, often from worn apex seals or oil control rings, leading to blue smoke. It could also be a sign of coolant entering the engine if there are issues with the water seals, resulting in white smoke. Additionally, a rich fuel mixture can cause black smoke, indicating potential fuel system issues.