In our aircraft (single piston engine, and injection system)
When engine is cut off. Fuel selector to Left or Right or Both, Mixture rich, and boost pump ON, when you advance throttle, the fuel flow must rise a little, but it doesn't work on the gauge. I've checked with Simvar watcher and no fuel flow coming up. But aircraft can start correctly, fuel lines is OK, and fuel junction too.
Do you have any idea ?
[FUEL SYSTEM] has been done and working great by the way. But the fuel flow gauge still doesn't work at engine cutoff. When engine is running, the gauge is WORKING great !
Thank you so much.