That was a great explaination. Completely logical.

I did no disassemble the valve to clean it. I was trying to clean it through the valve openings.

I may do as you described and apply voltages to see if the valve has the ability to control the idle.

The valve looks like it is held together with a crimped band around the middle of it. I assumed it was not serviceable. I may just take it apart and try and clean it, since my next step it to purchase the valve anyway.

I appreciate your help.

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1983' SL500 euro