Plug your meter (in mA mode) into one side of the connector, it has to be in series. I designed a male/female plug for this purpose. Usually a problem in the ICV circuit is high idle.

But, on to your misfire problem. As pawoSD stated, your problem is more likely to be ignition related. Can you describe your misfire condition....is it a miss at idle that clears up when you accelerate?

Of course the obvious things are: rotor, distributor cap, spark plugs/wires, ignition control module, etc.

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible