Thanks for everyones help. classic swede was right . I rebuilt the vapouriser with new diaphragm and seals all through. The diaphragms looked ok but some of the seats looked worse for wear. Nearly back to normal! Before the rebuild the laptop wouldn't connect to the ecu all software seems ok and usb drivers updated and com port on 1 . com,es up with error CO1. Tried earlier software version and different laptop with same result. Does anyone have any suggestions please? regards Richard