Reviving an old thread...
We were cruising along to Oshkosh and I got a high manifold pressure reading.
No change in the engine's running or performance, so it didn't suddenly grow a turbocharger.
The Dynon MAP sensor just has the 3 wires connecting it to the EMS unit.
Power (red/white), MAP (green/red) and ground (black).
Since the Dynon EFIS got the MAP sensor output, and alerted me, it would appear that the sensor is likely having issues.
We also experienced this briefly as we were in the long line to depart Oshkosh. The rest of the trip it was perfect.
I did also note that my Electronic Ignition Commander was offline. I used the VP-X to recycle the power to it and everything came back online. We did get a few drops of water from the morning dew getting under the tip up canopy, but the location of this MAP sensor is away from that and right up near the firewall. Probably a coincidence? The P-mags share a connection with the MAP line that comes off the #3 cylinder, and gets tee'd off to the MAP sensor and the P-mags. The EIC showed the same advance angle, and no changes noted on the EGT/CHT's during this event.
So, am I correct in assuming the sensor needs to be replaced? Is that how these fail with a high reading?
Looks like this is a standard automotive part, so hopefully I can find one with the part numbers in this thread for less than the $90 that Dynon currently wants.