I just had my muffler changed and now I'm getting a lot of exhaust from my fresh air. I think it my have something to do with the air pump but I really don't know and vacuum system. Does this sound right? Any Suggestions??

 

exhaust from your fresh air? you'll have to elaborate more. a muffler shouldn't change anything having to do with air supply or emissions. what type of muffler did you buy?

 

I purchased a Powerpluse muffler from Racing Beat. As you might know the 79 and 80's had a thermo reactor and from there it splits into 2 pipes. One goes to the heat exchanger and the other into is a fresh air pipe which ends up on the side of the muffler. I will post a diagram later.. Maybe theres a block around the heat exchanger? I'll look at it when I get home.

 

The problem on My 80 went away after I came home from work. I started it and nothing. Took it out drove at 75mph for about 20 mins. It was smooth sailing..