when I get my RS4 started the idle is so hi that the car rolls on it's own, I have had the idle screw almost all the way out and i still does it and I am at factory on the HSN. I also have zero the servo and reposition the horn I am using a Spektrum DX 2.0 also.

have you checked for air leaks ? crack in carb body maybe ?

Thanks, I will check that.any suggestions on how to find a leak.

put some nitro fuel in a squirt bottle and squirt it around the engine, like in the area you think there might be a leak if there is a leak it should rev up alittle.