2004 won't start, possible bsi damaged by jump start, eco mode

[damtom85]

Hi thanks.

Yeah I started topic regarding faulty Bsi but once i got hands on lexia i changed mind. One of parameters says ' something syncronised' i believe immo is ok .

Other thing is that if immo would block fuel pump electrovalve then i wouldn't get any pressure from HP pump as valve would be in close position and all fhel would go in return pipe. But i was getting some pressure on connectiin to rail.

[C3driver52]

I don't know exactly how the immo works but if I was to guess, I would say it disables the injector go signal. I would expect to see fuel pressure but I have not had the need to dig into this myself.

Something synchronised sounds good but screen shots do get a better and more comprehensive picture without much typing.

Link to Forum help attaching images
how-do-i-use-the-c3-forum-f36/

[damtom85]

Hi .

I install new pump and issue is still there , new pump is giving 10 bar of pressure. Is this possible ? Two different pumps giving same pressure , low pressure .

I also check immo and other option in lexia and they are fine. Just isuue with P1207 .

Anyone has any other ideas as i will give up soon

[C3CAR]

I install new pump and issue is still there

The diesel pumps rarely give problems, you could say 'bullet proof' compared to, say, the injectors.

Is this possible ? Two different pumps giving same pressure

Yes, 2 pumps not being faulty giving the same pressure sounds just right.

I also check immo and other option in lexia and they are fine. Just isuue with P1207 .

So you have P1207 and lexia gives you no description, fault finding information, suggestions on what diagnostics path to follow? What version of lexia are you using?


No screen shots of P1207? They can help others who read these posts point you which way to go and saves a load of typing....

[Arfur Dent]

I install new pump and issue is still there

The diesel pumps rarely give problems, you could say 'bullet proof' compared to, say, the injectors.

Is this possible ? Two different pumps giving same pressure

Yes, 2 pumps not being faulty giving the same pressure sounds just right.

I also check immo and other option in lexia and they are fine. Just isuue with P1207 .

So you have P1207 and lexia gives you no description, fault finding information, suggestions on what diagnostics path to follow? What version of lexia are you using?


No screen shots of P1207? They can help others who read these posts point you which way to go and saves a load of typing....

The fuel pump pressure is taken from the common rail pressure sensor and not the pump itself. Why change the pump if you have a pressure fault recorded but not even done further tests to diagnose the pressures sensor itself? Its more complicated than even that. The computer controls pump pressure regulation and the fault is 'unexpected reading found when something else was expected at a particular time'.

[Arfur Dent]

diesel-citroen-c3/citroen-c3-2003-1-6hdi-t1088.html

The error message was

Permanent fault p1207
Diesel high pressure regulation circuit rail pressure coherence when starting.

Which when translated into a useful message means

You idiot you forgot to prime the fuel pump using the hand pump above the air filter housing.

[damtom85]

As i mentioned above , we connected fuel pressure gauge kit directly to high pressure pump and reading is between 6-10 bar , so basically we know that pressure coming out from high pressure pump is not 200 bar just around 10 bar .

I will poet picture of issue but Arthur wrote exactly right issue description .

Lexia is 7.83

Arthur you say to to prime the pump . How hard suppose to be that pump , rock hard ?

[Arfur Dent]

Arthur you say to to prime the pump . How hard suppose to be that pump , rock hard ?

No, not rock hard. You can feel a resistance when you squeeze it with your hand and sometimes hear the diesel being forced through the system when its squeezed.

The difference between having air in there and no air is quite noticeable when its changes but you can still squeeze the purge pump when it has no air.

[Arfur Dent]

the two immo screens showing the engine is ready to start, I don't know how they compare to yours.


Low starter cranking speed will inhibit the injectors from firing.

Immo problem with the key transponder will also inhibit the starting by injector control.

[damtom85]

One of mechanics from friendly garage said that if one of injector will be damaged computer will stop whole starting sequence. Is this true ? Another thing yesterday i disconnect one of injectors from power, lexia didn't show any fault , is this correct