Again, thanks for the input.
I am not the original owner and as far as I know the IMG is original.
I've done a little searching here about the IMG problem and it seems that most are reporting a CEL, rough idling, and stalling out on the road. I've not experienced these symptoms......yet. Maybe because it's a very small crack? I don't know.
Is there an easy way to test if the IMG is the problem?
Thanks