Your idle is controlled by the computer so to adjust the idle air you must first turn them all the way in to lightly seated then back out 3 full turns each. Then start the motor and let the engine fully warm up and make sure the choke is fully open with all the sensors plugged in including the one on the air filter housing (IAT) while it is running unplug the idle speed motor on the bottom front of the carb then adjust the idle air screws for the highest smooth idle possible then plug the idle motor back in and the idle should drop to around 700 rpm. If it dont drop on the side of the carb next oto the throttle cable is the antidiesel screw what would be the idle stop screw on a regular carb back it out until the idle motor controls the idle then back until it almost touches the throttle lever. Then turn off the engine and the throttle motor should fully extend opening the throttle. This is the curb idle unplug the idle motor and start the motor then adjust the position of the idle motor for the proper curb idle speed lock it down and plug the idle motor back in and it should idle down. Unless you messed with the choke it should be close and before you do anything check for vacuum leaks and all the vacuum lines are where they belong and put a new PCV valve on it. There should be a vacuum diagram on the radiator support. If you have run it with a sensor disconnected you need to reset the computer disconnect the battery for 1/2 an hour make sure everything is connected then go through a complete warmup cycle before you make any adjustments to the carb. GL