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I also tracked down the same wiring diagram...I have the following 2 sensors on my car : the 2 pole one is on the left rear cylinder head (driver's side) and the bigger green 3 pole one is on the front of the motor. I know the 2 pole one runs to the EZL and the CIS-E control unit (B11/2 on the wiring diagram), but I'm not sure what the other does...
I didn't think I had the time switch, but that one of the 'coolant temp sensors' controlled the cold start valve. Although, I am now pretty sure that it is only activated when the starter is running - and only if temps are below 50F (which hasn't been the case here for months!). So I don't think my cold start valve is causing my problems unless it's leaking all the time...which I need to double-check.
Some observations: My idle surges up and down and during this my mixture runs from 48% up to 90% (using my Sears multimeter on pins 2 and 3 of the diagnostic socket) - almost rhythmically . Sometimes it gets stuck at 98.3% and stays there until I bump the gas...
I didn't think my idle control valve was working, so I pulled it off and cleaned it with brake cleaner and I think that helped. But my idle is still an up and down rhythm...I don't know if this is related or not to my heat soak problem, but I don't know what is!
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RG Newell
1984 300D
1972 250
1986 560SL
1991 300CE
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