On my RV-9A with Garmin G3X Touch, there is considerable lag in the manifold pressure reading when changing the throttle, and the reading does not settle down to a steady state once the throttle is fixed but wanders. I'm wondering if the tube is too long between the manifold and the sensor.
RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
ATP CFII PhD, so I have no excuses when I screw up
Vaccines kept me out of the hospital but COVID still cost me a month of living, all told...