There's 3 or 4 different things plugged in near the throttle body. You've got the intake air temp, MAP, throttle position (can't be changed), and IACV.

You say you're throwing a code. Why don't you help us out and tell us what that code is? That'll tell us right away what it is you keep plugging in and unplugging.

What do you mean by "surges at idle." Be more specific. I can't read your mind or see what your car is doing.