wouldn't the computer send a signal to the solenoid to open up the valve though? and wouldn't the o2 sensor be telling the computer that x amount of unburnt gasses are in the exhaust leading the exhaust gas recirculation valve to open letting those gasses get mixed into the intake? wouldn't the ecm adjust the a/f for those gasses from the egr? as i said though, i base this on slightly older cars than most folk here.