My car starts normal then after i turn it off and try to start it it takes a while to crank like 10 seconds and it has a misfire

 

Sounds like you might have a leaking fuel injector. It will flood the engine with raw fuel after shut down and it takes extra cranking to clear it out. A scanner will be needed to diagnosis it. After the repairs a new 02 sensor would be a good idea.

 

Did you ever get this resolved. I'm having a similar issue.