Having trouble starting forklift. It starts for 1 sec and shuts down. I replaced propane tank line, fuel filter, and fuel regulator. Same problem. The new regulator did not have the pressure sensor included. The port that it screwed into on the old regulator just had an Allen bolt in hole that i could not remove. I put regulator in a vice and bent the allen drive. I was afraid to use my impact wrench as i thought it might damage regulator. I can find no info in manuals of what the pressure sensor does and how it operates. Will the forklift run without it? What if I jumped (shorted) across the 2-wire connector? Can someone knowledgeable enlighten me a little please. Could a bad pressure sensor be the problem?

thanks