MY SCENIC WILL TURN OVER BUT WILL NOT START. I HAVE CHECKED PLUGS, BATTERY, PETROL, COIL PACK, TDC SENSOR. EVERYTHING IS FINE. I HAVE BEEN TOLD TO CHECK CPS SENSOR BUT CAN NOT FIND IT COULD YOU PLEASE TELL ME WHERE THIS IS? ALSO ANYTHING ELSE I CAN DO BEFORE TAKING IT TO RENAULT.