What is the best way to diagnose a malfunctioning fuel pump in a Vauxhall Insignia?

My Vauxhall Insignia is experiencing difficulties starting, and I suspect it may be due to a faulty fuel pump. What are the signs of a failing fuel pump and what steps should I take to confirm this diagnosis?

The most common symptoms of a failing fuel pump are difficulty starting the vehicle, stalling, and loss of power while driving. To confirm the diagnosis, you can use a fuel pressure gauge to test the pressure in the fuel line.

Another way to diagnose a faulty fuel pump is to listen for a buzzing noise coming from the fuel tank when you turn your ignition on. If you don't hear this noise, it is likely that your fuel pump needs to be replaced.

In addition to these methods, you can also visually inspect the fuel pump and its connections for any damage or leaks. If you notice any of these issues, it is a clear sign that your fuel pump needs to be replaced.