I have had a flawless fuel flow indicator for over 10 years. On the last flight, it would not change no matter how much I leaned the engine. I have a Lycoming 0-360 A1A. I also have an early HS EFIS. The readings are the same there. Everything ran as normal except the fuel flow read 14.6 GPH. Any ideas on what to check first?
The model EIS is 4000. The software version is 44S65F. The SN is 19050
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