How do you loosen spark plug on 1990 mazda miata?
Turn it counterclockwise. If you are having problems getting the plug out of the rotary engine, then do not force the plug out. You can try spraying penetrating oil around the plug and letting it set overnight, then turning the plug back and forth until it finally comes out, but! Be very careful as it is very easy to strip the threads. To be safe, I suggest you take it to a professional for removal.