I have a BA11 series two XR6 turbo 6spd manual. travelled approx 140,000 k's. It has an intermittent fault where the engine appears to almost cut out when under load. at first it would happen if for example if the car was in top gear and travelling at approx 90kmph I would drop back into fouth and plant the foot. as soon as the revs climb to approx 4000 the power would cut out completely until you removed the foot from the accelerator pedal and then the power would restore. and no time does an engine light etc illuminate. the problem appears to be geeting worse. Now when accelerating from a standing start as soon as RPM hits about 4000 the power cuts and while I hold the accelerator pedal down the power cuts back in for a micro second and cuts back out again until the the pedal is released. Also when the power cuts out there is a noise which sounds like a bang. I took it to Ford and surprise surprise they could find nothing. They said that dianostics revealed no fault codes and that it is pulling like a freight train. Could anyone provide me with a suggestion as to what the problem could be. BZXFR1@gmail.com Cheers Mike.