My lcr has been running rough when cold so I checked the fault code with vag-com and it came back with 19534/P3078/012408 - Throttle Control: Airflow at Idle too Low. Ross-tech'swebsite said possible causes are solutions - Clean Throttle Body, Perform Throttle Body Alignment (TBA). Check for Intake Leaks, including PCV system and Evap (N80) solenoid Any ideas whats the most likely cause out of the two? Where is the n80 solenoid? Would anything else cause the same fault code? Maybe a maf problem?