Thank you all for your responses. All good suggestions, but I think Chris might have nailed the culprit since the exhaust is new(er) form the manifold back. The guy that put in on told me to bring it to the shop to have a look. I think the key is that I can smell it going down the highway so it must be up front somewhere. Muffler guy also said he would check to make sure all the nuts are tight still, but I know the PCV think has been due for a long time.......thanks again.