20 oz bottle of Techron, and ran a tank through it. The car has two modes, it idles/runs lumpy and won't take the throttle - anything more than halfway on the Economy vacuum gauge and power is reduced - you lift off the pedal and the car speeds up.
It won't rev past 4000. Then it goes randomly into a mode where it clears up and will run to redline.
The idle is higher than it should be and vacuum too low at idle.

I have convinced myself that the fuel injectors must be clogged and at the spray pattern is sub-optimal even when they are flowing. I think the IAC is holding the idle high for me and causing the reduced vacuum.

I have ordered a set of injectors - only $75 with postage from ebay, and some seals. Next week we will know more.