I recently replaced the airflow meter in my '02 Defender Td5. After suffering the usual symptoms of intermittent power loss. This seemed to fixed the problem considerably. However, I now get the occasional split second power loss at 90kph, (60mph). It only happens when holding at that speed. Not when accelerating or backing off. Passengers don't notice it.. I also recently had the injector AND engine wiring looms replaced, so I doubt it has anything to do with that. Any advice appreciated...Regards Scotty.