I've searched the archives but haven't been able to find an answer.
I've got a problem that the LH tank (capacitive fuel sensor) in my RV-7A will show the fuel level dropping considerably when ascending to altitudes say 6,500 ft or above. For example, today I was going on a long flight just building hours and sightseeing. Everything was working well for more than an hour, but shortly after refueling, the gauge for LH tank starting reading lower and lower, dropping to about 4 gal showing on the gauge. When descended later in the flight it came up some, but not all the way. When I landed and topped off the tanks, I'd only used 4 gal out of that tank.
The correlation with altitude makes me think it's pressure related, but I can't figure out how that would affect the capacitive sensor. I did have a leak in the tank and fixed that recently (It passed balloon test).
I checked that the vent line was clear some months ago when this started, and will check again this week since I can't think of anything else.
Is it maybe a ground problem?
Thanks for any suggestions you might be able to offer.
Clear Skies,
Matt Wood
Commerce, TX (2F7)
I've got a problem that the LH tank (capacitive fuel sensor) in my RV-7A will show the fuel level dropping considerably when ascending to altitudes say 6,500 ft or above. For example, today I was going on a long flight just building hours and sightseeing. Everything was working well for more than an hour, but shortly after refueling, the gauge for LH tank starting reading lower and lower, dropping to about 4 gal showing on the gauge. When descended later in the flight it came up some, but not all the way. When I landed and topped off the tanks, I'd only used 4 gal out of that tank.
The correlation with altitude makes me think it's pressure related, but I can't figure out how that would affect the capacitive sensor. I did have a leak in the tank and fixed that recently (It passed balloon test).
I checked that the vent line was clear some months ago when this started, and will check again this week since I can't think of anything else.
Is it maybe a ground problem?
Thanks for any suggestions you might be able to offer.
Clear Skies,
Matt Wood
Commerce, TX (2F7)