I've got a hyster with a spectrum vaporizor and when I start the truck it starts and immediately dies. Thought it was a gas problem cause it starts just won't run, tested vaporizor and it was blowing 10lbs(way to much) so replaced it and same problem persists, pulled the gas line to the carburator from the vaporizor and nothing! So went to the elec shut off and pulled it apart and hit the key and have gas there so know the gas is coming in and not out any ideas???