the problem definitely seems to be around that harness connector in front of the passenger strut tower.
I checked the dark blue/green signal wire for the left EGO before the connector and it was around .5 vdc at idle, after the connector, barely anything .04 vdc-ish. I noticed while fumbling the wires around that I got a temporary signal to the pms for the left ego, and then it slowly discharged.
I don't know much about these connectors, and didn't think they could crap out like this. I am now going to cut the signal wire for the left ego and make a new bullet connector for it to test it out.
it would be nice if this is it...
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1988 GT Convertible
331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta...
One week with new motor, two speeding tickets...joy