Flooded Mazda RX8?
I run a bodyshop & have had this problem with rx8’s.As the vehicle is fuel injected holding the throttle open will not clear it as the injectors will still keep pumping.The best solution I have found is to locate the fuel pump fuse(cant remember where it is on the rx8 now)& remove it,connect a booster pack or surge protected battery charger to the car and spin it over with wide open throttle,you should shortly hear it trying to fire and then clearing,reinsert the fuse while keeping it spinning over.This works for me on most fuel injected cars.Cheers