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Sorted the problem by locating the impeller cockpit side of the firewall. Must have been getting too hot engine side. Readings are sensible now and rock steady. Very accurate.

I am having trouble getting a sensible reading from my fuel flow meter. It's ok to start with then in flight it will suddenly come up with high fuel flow warnings and the meter has jumped from around 20l/hr to 36-37l/hr at the same engine power setting. The problem is worse at higher engine...

Updated from 5.0.0. on the EFIS, D100 to 5.1.1. Both the D100 & D120 were on and working correctly. Lost the DSAB connection after updating and the compass readout is shaking badly and giving a false reading. Went to update the D120 after realising that was also on version 5.0.0. but cannot...

Checked the calibration on my left tank by filling in 5litre increments.  The overall calibration seems fairly accurate after all. Just not happy with the results at either end of the tank capacity though. The first 5lts I added gave no reading as expected. The next 5lts didn't register the full...

Calibration results were as follows. 1    2929    0.0      (dif 419) 2    2510    1.32      (217) 3    2293    2.64      (374) 4    1919    3.96      (330) 5    1589    5.28      (269) 6    1320    6.60      (161) 7    1159    7.93      (233) 8     926     9.25       (180) 9     746    ...

Calibrated the right tank OK and the display reads 50lts. which is the full value. The left tank appeared to calibrate ok with all the right figures and messages throughout calibration but then right at the end message came up “tank calibration unsuccessful. Do you want to use the settings...

Have been calibrating the fuel tank sensors with the Dynon today on my sportcruiser, unsuccessfully. Followed instructions as per the manual, adding 5lts. at a time as per the calculated display request . The left tank sensor did not register any of the additions but carried on any way to see...

If i was to install a EFIS D100 would you consider it wise to install back up flight instruments also? If so what?