my engine is doing this weird noise like if it was restricted first i thought it was the cat that was clogged up so i took it out and it still does it, than i thought it was wit the full and it still does it, so i did a compression check and the fron one was ok, but i got no compression from the back at all, does that mean i blew an apex seal?

 

sounds that way, have you tried the atf treatment, go to www.mazspeed.com(under facts, atf treatment) try that. good luck