[The Benz Master]

i think most 190e's have a 3 wire idle air valve!? if it's two wires, i guess you could make it work.

indeed, when the engine is cold, it's harder to get it started without a idle control valve. You have to step on the gas a few minutes to prevent from stalling.

i do use the "fast-idle" port on the megasquirt to control the fan and it works fine... that's also one of the reason why i'm going to a GM 4 pin IAC... it connects elsewhere on megasquirt.