The 3.6 motor idles/accellerates normally up to 4500r.p.m. then stutters with a irregular misfire and loses power. As soon as the revs get below four thousand all ops normal again. I recently replaced the sensor at the cranck pulley< damaged by a incorrect A/c belt>, but changing the sensor clearance does not seem to have any effect. This seems to be at exactly the point where the power previously kicked in. Should I be looking at airflow problem or arewe still at electronics? Any advice much appreciated. Only ona dealer in Namibia 250 km. away!