Flow indicators lie.
Cessna have had some well documented problems with flow dividers.
We need to be very wary of what is apparently displayed on an instrument, they often measure one thing and display another.
Fuel flow instruments on older Cessna for instance do not measure fuel flow they measure fuel pressure and display it as fuel flow.
Most ppl would expect an excessive high fuel flow to show a leak, in fact in a cessna it shows a restriction, normally a blocked injector.
Equally (all esle equal, fuel on, mix open, pump running)a low fuel flow will often indicate a leak, either a damaged injector pipe or diaphragm.