where did you buy the throttle bodies from, I only ask because if it was a tuner like sean roe, I say call them, they will probably walk you through the actions to take anyway but I always felt strange asking others for advise on products not purchased from them if that is the case. I do believe a wired sensor goes into the throttle bodies that is the culprit here, perhaps called the tps, known as the throttle position sensor wires. usually they have some adjustability issues when disconnecting them and reinstalling on new throttle bodies, but a slight losening and re-tighting can solve this. you need a digital multi-meter to do this adjustment and you will need to read the voltage on the the tps sensor to ensure it lies with in the recommended range when the throttle is open and shut. this is why your car is throwing codes. I believe the tps reads close to 5 volts when the throttle is fully open but not exactly sure if it goes to 1 or 0 when in the closed position. I delt with this same issue when installing a tps switch on my nitrous systen not long ago. sorry I dont have anything else to tell you. good luck and be sure it is merely an adjustability issue and not one you should be overly worried about.
