CJ1904

I have a 07 IS250. I think i blew my pistons, because I was driving on the free way, and all of a suddend, my MPH started tailing of, but my RPMS increased. I took it in to the local fire stone, because there is no Lexus dealership around where I am. Closest one is about two hours away, any way, I just got back the Diagnostic back and it came back with some codes: PO300, PO301, PO302, PO305. As well as my VSE light is on and my check engine light.

I have looked through threads and post on here, and a lot of people have had the same problem with the same thing, at around 150K miles. If any one has had the same problem please let me know... Im Stationed at FT.Riley KS, and if anyone is around that area, can you please help out...