Cool! Let us know what you find.
For safety's sake, there's a lot of wisdom in letting a professional have a look at fuel-related problems, especially fuel and electricity. The section of the service manual I posted describes removing the fuel pump module in order to manually operate the float. I'm not sure that's necessary because a reading can still be made without removal.
Please take some time to make a garage entry in your profile and tell us about you and your Mirage: Garage empty: add car
View my fuel log 2015 Mirage ES 1.2 manual: 50.1 mpg (US) ... 21.3 km/L ... 4.7 L/100 km ... 60.2 mpg (Imp)