Why Does your rx-7 smoke?

blueish smoke means its burning oil (too much oil i.e. you have a bad seal or maybe your oil metering pump has somehow gone insane)

thick white smoke means its burning coolant (bad seal)

black smoke means its running WAY too rich and your engine is probably about to die unless you change that

it should not puff out any smoke at any time really unless its on a pretty cold day and only until your engine warms up then it should go away because the exhaust is so hot.