EGR Valve Modulator OEM Replacement Vacuum Solenoid Modulator The EGR Vacuum Modulator Valve controls the amount and frequency of vacuum sent to the EGR ValveWhen not replaced, vehicle may experience excessive or non-functioning EGR Valve, engine stall at idle, failed emission test, high NOx emissions, surging at highway speeds, hesitation and/or CEL illuminationDesigned to meet or exceed OE specifications in form, fit and functionThis EGR Valve has been tested and is in good working condition.SAME DAY SHIPPING AND FREE SHIPPING.On Aug-03-13 at 22:55:35 PDT, seller added the following information:Every buyer gets a MyStoreRewards invitation for cash back