MDE3
Thanks for joining the fray.

interesting input. As to the 02 sensor, the frustrating thing is nothing I have changed, swapped, replaced etc. has made any difference at all. That's why I am beginning to think ecu. I do want to check continuity on the 02 sensor green wire. The trouble with changing so many parts and testing is you're never sure if you have't pulled a wire out or broken some internal connection. I have no base line to judge anything by. Like you I have tuned the car without eha and it runs okay (hard to start) but that's not how I want to run it. I wish I could lay my hands on an ecu to just plug in and see if anything changes.

Michael