Sounds like the same problem i had and fixed (fingers crossed). However i never got any errors codes, also when it was cold it went like a bucket of crap like i mean bad, when driving on the freeway it would happen and when you try and boost nothing happen. I changed just about everything sent it to mechanic's and still nothing, i ended up changing a temp sensor(spare one sitting around) in the radiator and since then its been fine for about a 6 weeks now. I guess one good thing from all that was most parts a new now.