Thanks subford, I screwed with it for 20 min. and gave up.
To take the map sensor out of the equation I ran a vacuum solenoid off a throttle switch that would dump vacuum to the map sensor as a test, pcm didn't care if it saw 160hz or 155hz still closed loop.
Is it possible the pcm is looking @ the correlation between speed and rpm to allow closed loop? it's a long shot but maybe I'll try disconnecting the speed sensor and making a pass.
Any other thoughts?