I am checking the O2 sensor now. It is at 100C, its about 80 ambient. I get a fluxuation from 0.01 to 0.7. The flux is pretty rapid, my meter almost cant keep up. I shaved some insulation off the sensor side of the black/green connector and hooked my neg lead to batt ground. Is this normal? I dont know. another site said .2 to .8.

I get 9.5 volts roughly when checking at pins 2 & 3 of the round diagnostic connector X11. If i unplug the O2 it drops to around 6 VDC. Is this normal?

I am failing HC at idle. I have new H9DC plugs and my compression is 180-190psi.

I found out that the M103 engine doesnt have an EGR, its all Cats. I dont think it was hot enough at the first smog test. I heard a site say 50mph for 7 minutes. I put a whole tank of 91 octane and a bottle of RXP in the tank and I will try it when the tank is nearly empty, i will rev the engine in gear while waiting for the test.

Does anyone have any experience with adjusting the hex screw on the air cleaner? Please indulge. I am listening.

Last minute edit: The idle is around 1500-2000. I unplugged the IAC (idle air controller) and it went down to 700. I have 12.97 volts at the 2 pin plug at the IAC. The a/c is off or on, the volts do not vary. The car is up to 100C.
Any clues?

Prevost3000