[Helmsy]

Looks like you are measuring cold control pressure.

Cold starting (when engine is bone cold - left overnight) control pressure will be about 2bar.

If your fuel gauge has a lever then turn it to change from control to system pressure. The system pressure should be about 6 bar (ish).

If you could start your engine you would see control pressure go from 2bar (ish) up to around 3.7+/- bar (ish) as it warms up.

This is the difference between control pressure and system pressure because when measuring control pressure some fuel is returned to the tank.

Also I find it more convenient to just pull the green wire connector from the back of the fuel head than jump fuel pumps. Just my $0.02