I have a 99.5 F250 7.3 with 174K on the clock. Was recently looking around at the datastream on a SnapOn Solus Pro. I noticed the MAP readings seem a bit funny. BARO = 100, normal. At idle, MAP kPA is 83. which may be about normal.. but, the MAP Hz PID always reads 0.. at idle, while driving, etc. What is a normal Hz value for the MAP sensor?