This weekend I took out the stock wiring harnes because I'm installing MegasquirtnSpark. It turns out that the ASD is hooked up to the stock ECU (a connector from the ECU connectes to some kind of pump thats located behind the front right wheel). I'm wondering if I can hook it up to the Megasquirt. Can anyone tell me how the ASD works ? How and when does the ECU turn it on and off ?

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190E 3.0-24v (M104 980) turbo @ 0.8 bar
1/4 mile: 2.483 / 13.540 / 175.17 km/h (street tires)