I am looking at the md808 pro, Will this scanner do evap testing and manual functions open /close purge vavle or vent valve? If not what do i need to look for it having in the description so i know that scanner will do these functions? Thanks so much ive been looking a long time and this is my last resort to find one. Please help!! Thanks so much in advance.                                                                   Brian

 Thanks so much for your help.