Originally Posted by the.Santorini
I can't say that it isn't running well. It definitely seems to be for 1500 away from 100k. It just seems to have an unpleasant idle. I will be around a bunch of other XFi's this weekend so I can pay attention to theirs to see how they sound. When I say clunk, its not a loud obnoxious diesel clunk, but almost as if it were a softer one. Reading other posts, it seems our engines have somewhat noise valves? I will follow up on what I hear this weekend. =P
with a 100k on there, have you installed new plug wires and plugs yet...a little skip here there can cause that idle problem....I would clean the throttle body as well, check all your vacuum hoses....etc....