Hi all:
Well I could not keep out of it for long. Picked up a 1982 automatic. Ran poorly with a lot of bogging. I reasoned that it was running too rich and probably not in closed loop. Worked on wiring and hoses, and then had to turn CO screw a half turn CCW and to get it to run reasonably well. I have always had manual Deloreans, so I don't know how it is supposed to run, but so far it has reasonable power even with AC on from a dead stop (which it did not have before) so I feel I am headed in the right direction.
Here are my tests of frequency valve duty cycle (actually dwell method, 8 cylinder setting, data shown is multiplied by 2) :
cold 52 stable
warm 40-60 varying
warm O2 sensor disconnected 54 stable
warm O2 sensor input to ECU grounded 80 stable
warm O2 sensor input to ECU +1.5 VDC 32 stable
warm WOT switch engaged 60 stable
When driving, WOT second gear kick-down works.
Idle 750-800.
To me, I think I am still a bit too rich. Agree?
steve