It may have sorted itself from simple use. CO is Circuit Open, thats the usual fault you'll get. Dirty spots on the resistor in the tank will make it flash that. Sometimes running fuel through it so it moves across that spot will be enough to polish it. My Continental does that randomly, used to be a lot worse but I still occasionally get 'CO' between about 11 and 20 gallons.
One thing I've noticed with mine, if I fill it with the engine running it takes a long time for it to increase. I once drove for 2 hours and it "made" about 6 gallons of fuel. I put in 14. Shut it off for a few minutes and suddenly it was up 11 gallons, which is about right if you account for fuel used during the drive.
One thing I've noticed with mine, if I fill it with the engine running it takes a long time for it to increase. I once drove for 2 hours and it "made" about 6 gallons of fuel. I put in 14. Shut it off for a few minutes and suddenly it was up 11 gallons, which is about right if you account for fuel used during the drive.
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