What symptom would be present if an EGR valve sticks open?
What symptom would be present if an EGR valve sticks open? Check engine light: as with most engine management components, a problem with the EGR valve may trigger the check engine light. Engine performance issues: if the valve is stuck open the vehicle's air-fuel ratio will be disrupted causing engine performance issues such as reduced power, poor acceleration and rough idle. Is there a sensor on the EGR valve? A manifold absolute pressure (MAP) sensor is fitted to the intake manifold. The EGR valve and MAP sensor are quite accessible on this particular engine so testing the system was straightforward....