Recently installed an electric fuel pump on my 74 fj40. i drove it around he block and was somewhat satisfied as the mechanical fuel pump had died or was in the process of dying. I recently had the original tank cleaned and lined and I installed new hard lines and soft lines, a new fuel filter, a fuel pressure regulator, and a fuel pressure gauge, all prior to start-up. Went to start it the next day and I could hear the fuel pump whirring away, but it wouldn't start. Cranks good, but no turn-over. Checked fuel pressure gauge, reading zero. Don't know why. I though something could have clogged up a line, but the gas was filtered w/ a 0.45 micron filter before I put it back in the tank (gas is about 1/2 year old). Any ideas?? leftover crud from cleaning tank (doubtful)? vapor lock? clogged filter? at a loss.... anyone else experience this problem and am I missing the obvious??