after acceleration i get a popping or bubbling sound that sounds like its from the cat but i cant really tell. its more pronounced at 3k and up. i have a bad egt or egr valve if that makes a difference. my friend says its prob causing a missfire? any oppinions?

 

not a misfire. vacuum problems do cause exhaust to do this, even backfire

 

i thought maybe i had a hole in my cat/exhaust(sounds lounder than usual) and its been snowing alot and i got some ice build up and it melted down my exhaust or i went through some puddles?

 

I run open downpipe, and it burbles on decel all the time. Possibly just a loose exhaust.

Sound like this?
http://www.youtube.com/watch?v=JUYUnXhO0Rc

 

thats almost exactly what it sounds like, ecxpet for the fact that im running the stock exhaust

 

Likely a tear in the flexpipe or an exhaust sleeve that came loose.