Hi can anyone tell me how many EGR solonoids are fitted to the mark 4 2.8 grand voyager i have a management light on and my local garage condemned the egr valve solonoid i purchased one from my dealer £39 when fitted the light stayed on, is was told there are two solonoids so i went back to the dealer with a photo of the offending part but he couldnt identify what it was. my question is are there two valves or is the one i need known by another name best Ron