Codes that set do not instantly clear even if the cause goes away, so it's possible you had an issue testing the TPS that set the code and when you pulled the computer is did a reset. I assume driveability is still the same?
I almost wonder if your EGR isn't leaking by causing this, similar symptoms. Can you block it off for testing purposes?
Did your vacuum readings ever stabilize?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
