Failure P0091 Fiat Bravo 1.9 150 HP

[bravosport150]

but the pump in the tank, once the machine ? on keeps a constant pressure of 3bar, or at the request of the high pressure pump she adjusts to what pressure to push the fuel?

[danny677]

that and a constant , the excess of course back to the tank

[bravosport150]

ok then just mount a pressure gauge, turn on the car and also from a stop and in neutral, see if the gauge is I marks 3bar constant, if it does, it means that the pump in the tank ? to exclude, right?

[danny677]

exact, but by some accelerated, if the pressure were to fall visibly means that the flow rate that the pump has very little.

[bravosport150]

ok make? this test...

[ecucilacunta]

I advise you to take the test with a pressure gauge on the road.

[bravosport150]

but why? it may also vary in acceleration?

[paolo159]

why? acceleration is the demand for a greater number? of fuel, and if the pump fails to meet the required prex caler

[bravosport150]

but you told me that it is in the crowds both in acceleration and the pump in the tank has a constant pressure of 3bar, then at this point ? true that ? constant, but varies according to the requests of the accelerator?

[mariodarkblue]

you were told wrong, the pump pressure of the tank ? ALWAYS 3 bars...then what ? the hp pump that raises the pressure according to the request dle engine!