Originally Posted by SafeChav
The high pitch noise is the fuel spraying from the injectors!
You could try removing an injector and pressing the flap BUT BE CAREFUL OF YOUR EYES the fuel will spray out under very high pressure.
Its fine to try and start the car with the fuel pump bridged, wouldn't recommend driving it like it for safety reasons!
I tried to start the car with the fuel pump bridged but same problem: it doesn't start ...
I tried same thing and pushing the flap about 1cm and same result ...