Rough Engine Idle 2.3 Miller Cycle Engine
 

I am experieincing intermediant rogh idle. Once car warms up and while at stop light I will hear somthing click (almost a solenoid engage) and then engine will idle rough. Checked all tee fittings had throttle body assembly off and replaced all tee fittings. Still having problems. Does anyone know what solenoid is engaging while engine idling?

OBD 2 scanner did not display any codes, however, car would not pass emissions because the Evaporator, O2, Catalyst, and EGR systems are in a not ready status. Would it be advisable to disconnect battery and allow the system to reset?

No what u really want to do is drive the car to get those systems to go through their own self test procedures to see if they set any codes that might lead to your problem.