Is this the sound of imminent fuel pump death?
With ignition on it hums until pressure reaches 30psi. Then it start making noise. Flow is 1,2 litres/min. When engine is on pressure oscillates between 25 and 30 psi. No air bubbles in fuel. System pressure drops to 27 psi when off and takes half a day to reach zero.
Car is practically undriveable, stumbling above 2000 rpm.
I ask because the pump has had about three operating hours since 2017 and the previous pump (that leaked) made the same noise.
Pump is new type Bosch. I have no original, unfortunately.
Whiny pump. <———-link
With ignition on it hums until pressure reaches 30psi. Then it start making noise. Flow is 1,2 litres/min. When engine is on pressure oscillates between 25 and 30 psi. No air bubbles in fuel. System pressure drops to 27 psi when off and takes half a day to reach zero.
Car is practically undriveable, stumbling above 2000 rpm.
I ask because the pump has had about three operating hours since 2017 and the previous pump (that leaked) made the same noise.
Pump is new type Bosch. I have no original, unfortunately.
Whiny pump. <———-link