We have a D10a fitted to a Superior IO 360 with vp prop. We have just returned to service after significant engine bay and rewiring works. From the first post works test flight, we have had a fluctuating MAP reading, which peaked at the expected engine setting, but would drop part or all the way off the scale. Now the MAP reading seams to spend more time inop than reading anything at all. I suspect the answer to our problem is a loose connection / damaged sender, however, before we pull off the covers can you comment?