I got this P28 in my hands today. I had to post up pics to show the fine work some people do with chipping ECUs!
You know the whole thing called "through hole components?" This is the backside of the socket for the chip:
And for a reason that I am sure is beyond my miniscule comprehension, this IC was resoldered by this master of the iron:
During the desoldering process, I discovered that several of the pins barely had any solder correctly joining the pins to the traces:
(This whole post was written sarcastically, just to make sure that I am clear about this.)