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Question Fuel pressure fluctuations in flight (fuel pump off)

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Neal

Forums Chief Pilot
Staff member
Joined
Oct 31, 1996
Posts
1,534
Type aircraft owned
Carbon Cub FX-3
Base airport
KFCI
Ratings
COMM, IFR, MEL, SEL
2023 Carbon Cub FX-3 / Lycoming cc363i (IO-360)

Flew an hour this morning, all was great. I did notice my fuel pressure was cycling between 22 and 29 psi. Seems like a bit of an excessive range. What are others seeing? Any ideas of the cause or is this normal?

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