I am having the same issue with my Komatsu 40 with 4.5 propane does not want to start if I remove fuel feed line, as the fuel bleeds off, acts as though it wants to start. I have put a regulator and both injectors on it from another exact forklift, that runs and it still does the exact same thing. can you email me the pdf to sales at forkliftusa.com. i will appreciate anything you can send me please help