An update on the CEIS fuel sender issues. The readings have been unreliable since installation. thanks to Jeff R's (can't find his member ID) recommendation, I took it to the shop where he had his successfully installed.
a list of problems:
1. the senders were improperly grounded -- they were going to the "Garmin" avionics ground, not to a local frame ground IAW CEIS installation manual
2. a leak in a loosely installed sender
3. only 4 calibration points in a 44.5 gal tank (0, 15, 30, 44), so the readings were blocky from interpolation. it has been recalibrated now every @ every 5 gallons.
There is still an issue with the right tank, where one of the senders seems to be rubbing and causing a dead spot. they are going to try to fix it though the filter neck, but if they can't the lower access panel will have to be removed and resealed, which will some time to cure. so I am going to live with the dead spot, and run through some tanks of fuel to see if they readings are better
It seems like the installer was just lazy and didn't read the instructions or follow CEIS's instructions when they tried to fix it
Hoping to get it back tomorrow.