Bad exhaust sound but no bad exhaust!

[xexman44]

Thanks for the ideas. That is one thing I have not done yet is stuff a rag in the tailpipe, need another person to help me with that one. The most confusing part is that it still does not do it all of the time. Sometimes it is just as quiet as brand new. But when it is making the sound, you can't find out where it is coming from. I'll keep looking, I guess when whatever it is burns all the way through I'll find out what was wrong! Is that a good technique or what?