Failure P0091 Fiat Bravo 1.9 150 HP

[danny677]

I would add that, if you are at least 3 bar, you can ensure that the diesel fuel needed to pump rail main otherwise would not know how to suck it to push it to the injectors and give them the right flow rate.

[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?