Hi, I have been having issues with my Mazda 5 diesel stalling out and currently will not start, it flags up a Rail pressure sensor error code. I would like to change the fuel filter but can not find any instructions on how to purge air from the system after changing. Is it ok just to fill the filter to the top, reconnect and cycle the pump a few times before starting? really don't want to introduce an airlock and make things worse. Any help appreciated