Don't you hate it when you follow the instructions and it dose not work.
first clue to me is you reinstalled the OE MAS and it runs but rich. Is this assumption because it smells rich or do you have a Wideband ?
You said stock so I think not. Do you have a SCANMASTER ?
IAT ? dose your Scanmaster show any AIT temp ? even if it doesn't I can't see that being the problem.
Have you checked every plug on your Translator ? No bent pens.
Once we know you have a scanmaster this will help.
The directions say All Others I think it would include Stock, have you pulled the ECU and seen stock? I was told 15 years back mine was all stock. It had a Kenn Bell.