Failure P0091 Fiat Bravo 1.9 150 HP

[bravosport150]

are you referring to the pump in the tank?

[danny677]

it could be spompa

[bravosport150]

but with multiecuscan can I do a test/test/active diagnosis to see if it works as it should the pump in the tank?

[danny677]

ecuscan I don't think but the examiner fiat surely.

[paolo159]

it also does multiecuscan, look in the section actuators (F6) - fuel pump relay.

to do the test, keep the car off, and in a quiet place, as you turn on the pump you will have to feel the tac of the relay, and a sort of slight whistle if the pump works

[danny677]

Ok, but the deviation of pressure in bar ( usually at least 3 ) you say ? It is obvious that the on/off even without a diagnosis, the experience - in addition to the fact that if off should not be in motion

[bravosport150]

is the test on/off I have already? fact and feels the operation, but I was wondering if you could do an active diagnosis of pump pressure tank...can you? to do with MES?

[progresso]

to see the pressure of the pump to dive you have to connect a pressure gauge on the tubes, at the entrance of the fuel filter, possibly, by the examiner multiecuscan see only the high pressure as a parameter

[bravosport150]

ahh, behold, now ? clear.

[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.