The reality is that if anything in your PCM changes, any number, even one, for any alien or unexplained reason.....the car wont even crank over let alone start. Its called a checksum check that the car does evertime the ignition key is turned to on. Remember throttle faults were there long before there was tuning for an XR6T on the market, and they will continue to exist. If your car loses power for any reason, regardless of whether its Edit or Piggypop, check with your tuner. There are no fairies at the bottom of the garden, there is a logical explanation for everything, and most if not all of it is finger trouble.