Yes I have checked the timing and I have installed the distributor multiple times. All of the markings line up. I plugged the vac line to the vff and nothing happened. At the moment I'm cleaning the filter in it. It didn't have too much crap in it so I believe the fuelock works properly. I'm waiting to find something stupid that I missed but I have been unlucky on that adventure. is the vff just an on and off valve or does it have some influence on the flow rate when working properly.