I don't think I'd spend the money on the O2's if I were you, according to the voltage they are putting out they look fine. The code 33 error is a little wierd. Have you checked the EVP?
You can check the EVP resistance by connecting your VOM to the EVP signal pin (on the EVP, closest to the flat side of the connector in the middle). Connect the vacuum line for the EGR valve to a vacuum pump. At zero vacuum, you should see resistance of about 5K ohms. Resistance should drop smoothly until you reach 10" of vacuum which should be 100 ohms. I've had these go bad on me in the past.
Since the code 33 is telling you the EGR valve isn't moving, it could also be a vacuum line issue.
As far as your TFI wiring goes, the book I have shows the 3rd prong down from the top should have power on start only. The 4th prong down should have power only under run. Is this the way it's wired?
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