Rattling and idle issue.

I got my Vibrant exhaust put on a couple days ago and I did not get new hangers for it, so i presume that is what the rattling is from during acceleration. I also am experiencing some ilde issues similar to when my wastegate went bad. when I come to a stop and my air conditioning fan turns off, the Idle drops a bit then goes back to normal. It does this usually 2 times and then when the fan comes back on it is fine. I definately need a tune now also. sometimes it pulls so hard and others it feels like its hesitating so much. Any input would be great thanks.

bump

bumpy