For the benefit of other, I will pass on the solutions to my code 17 problem.

I decided to clean the contacts with contact cleaner and 800 sand paper on the ECM and connector. I did the same with MAS.

After doing this I again found 12.74 volts at the X 11 connector, pin 1 and 2 with the key off.

When the key was turned on voltage decreased to 6.74 volts. I started the car and after about a minute of 6.74 volts, the O2 sensor kicked in and the voltage oscillated between 1.2 and 2.4 volts. I adjusted the air fuel mix until I obtained about half of the high voltage of 12.74v. I set the air fuel mix voltage at 6.35v. I ran the car for 300 miles without the check engine light going on. I think I'm done.