Allrighty:
First, i ohmed the Sensor: No grounding to the sensor wall that i can measure from either of the cables.
So i took the AIR Pump off, as you suggested.
What a PITA. Tried to just take it off on one side and slide it out of the way: No way. So off it came.
With the AIR Pump off, it finally moved. I had to pull on the wrench with my whole body and it finally went (and my elbow went into the side of the car too :ugh).
I had to use all my strength (which isn't much, but..) to get it to turn on every single turn.. The scrapes on the line (Fuel, i presume) are from my previous attempts. :eyerole
But the 26 year old CTS is out: :bang
And it looks rather crappy. The connector for the sensor cables was wiggling in it's holder. :nono
And the new one went in (rather quickly, as i did loose a little fluid):
Now, the new one didn't go in smooth, but i had to use my full strength again, pulling on it with both hands and getting a little further each pull... In 26 years, I'll be cursing myself.
Also, i didn't get it all the way in (I don't think the old one was either), but there is half an inch of threads left, but thats the most i could get it. I also don't want to over tighten it and damage the front of the sensor (I don't know the inside clearance). But it appears to be tight, no leaking.
Phew... Now the easy part: Black went onto 'A' and yellow onto 'B', connected it and the AIR Pump went back on (With some convincing, as the bracket seems a tad bit tighter then the bolt holder :eyerole).
I pulled the fuse (30Amp) in the battery compartment and did a shake down run. Initially it didn't seem to make a difference but it smoothed out a bit. I don't think it's 100% there yet, but i have hopes it will be on the next few drives. The Idle seemed smoother at the end of the run and it wasn't shaking as much anymore.
One more thing though, that i noticed:
While i had the AIR Pump off, i looked at the front (Where the belt connects) and that didn't seem to run perfectly round but lopsided. It turns (and the more i turned it, the smoother it became), but it seems crooked. And i couldn't get in there to check on it, seems shuttered with something (I took the 5-6 screws out, but no movement).
Anything i need to do? It seems to be working ok, as far as i can tell, the motor is running the Pump ok.
But: It seems that we're there with the other stuff, so a big
THANK YOU
to all, but especially to Pete.
Couldn't have done it without you!
I'll come back to this thread in a week or so to update on the idle, i should be driving the rig to work, so it has some time to get acquainted with the new parts.