If that is the case than Fitech did a poor job with wiring internal to the fuel pump. Posts a while back said their was a problem with a soldered connection in the ECU causing the no start when hot. I had mine on for 2 years and 1400 miles before problem cropped up. You'll never know the feeling of a no start condition till it happens to you. Then you see your Baby on the flat bed going home. It started and ran fine next day when cold but after running and hot refused to start again. By the way I do have a relay on the fuel pump, and the ECU just turns on the relay.