I was using my Kubota 3430 the other day and It just quit running, It sound like it was empty so I checked the fuel filter and there was some sediment crap in the bottom, so I changed the filter, cleaned it out and turned the petcock on and let the air escape before tightening it back, now It wont start.This tractor has run perfectly until this, also any advice on bleeding injectors, if that would help, any help is appreciated.