ok guys got a car to try it on, i fitted a spare pcm which i had lying around, flashed tune into vehicle and checked no worries starts and runs drives perfect. so i transfered the tune to the road runner, went to start no start at all, fans turn on, fuel pump gets only a quick operation. and scan tool still wont connect. sounds like definately faulty pcm.
will ring moates this afternoon, to see what he has to say