Clean it out and see...
There's a dozen reasons why you could be running lean -a stuck (open) EGR would only be one of them. How's it run at cruising speed?
It looks like you are looking for some (musical) gigs -what do you play? I used to be a (fairly) well-respected bouncer at the Frog, Bear and Wild Boar Bar -maybe I could call the guys and put in a word for you..?