C5 2.2hdi Cuts Out While Driving

[RPJS]

C5 2.2HDi Executive '02 plate

 

I have a very strange intermitant problem with this car, for no apparent reason it will just cut out while driving, it does not go into limp mode, the engine just stops dead and will then not restart untill the key fob has been pressed several times.

 

When the engine won't start I have found the following.

 

Fuel filter bowl full of fuel

No fuel feed from low pressure pump

Injectors not firring

Lots of fuel presure at injectors

 

Having pressed the key fob several times the feed from the low pressure pump will come back and the car will start and run untill the fault happens again (could be a couple of mins or a couple of hours).

 

I'm convinced this is an immobiliser fault (I don't get any faults on the LCD) but I don't have a clue where to go from here.

 

I have had 2 diagnostic checks done, the first by the RAC came back as low battery voltage even though the battery metered at 13.6v. The second by a local Citroen garage who said it was the high pressure pump at fault, having checked the output from the pump I think we can rule this out.

 

Is there any way I can bypass the immobiliser??

[mlkey]

C5 2.2HDi Executive '02 plate

 

I have a very strange intermitant problem with this car, for no apparent reason it will just cut out while driving, it does not go into limp mode, the engine just stops dead and will then not restart untill the key fob has been pressed several times.

 

When the engine won't start I have found the following.

 

Fuel filter bowl full of fuel

No fuel feed from low pressure pump

Injectors not firring

Lots of fuel presure at injectors

 

Having pressed the key fob several times the feed from the low pressure pump will come back and the car will start and run untill the fault happens again (could be a couple of mins or a couple of hours).

 

I'm convinced this is an immobiliser fault (I don't get any faults on the LCD) but I don't have a clue where to go from here.

 

I have had 2 diagnostic checks done, the first by the RAC came back as low battery voltage even though the battery metered at 13.6v. The second by a local Citroen garage who said it was the high pressure pump at fault, having checked the output from the pump I think we can rule this out.

 

Is there any way I can bypass the immobiliser??

 

From what you say, it sounds like electrical fault around the ignition or immobiliser circuits. I would check the switch on the back of the ignition barrel, could be dirty or worn. Simple (cheap) things first. Should be very careful, playing with the high pressure part of the injection system, 1300 bar will do serious damage if you get it wrong.

[RPJS]

From what you say, it sounds like electrical fault around the ignition or immobiliser circuits. I would check the switch on the back of the ignition barrel, could be dirty or worn. Simple (cheap) things first. Should be very careful, playing with the high pressure part of the injection system, 1300 bar will do serious damage if you get it wrong.

 

Thanks mlkey, I havn't checked the ignition switch wiring. I'll let you know if I find anything

[RPJS]

Thanks mlkey, I havn't checked the ignition switch wiring. I'll let you know if I find anything

 

No luck with the ignition wiring, the car still has the same fault, I'm going to get it pluged in again on Monday see if there are any new codes.

[techbod]

its a recall issue and software update, what happens is fuel pressure is lost at a crucial time and the engine dies but will fire up straight away and also injectors leak air and that's a recall as well

[RPJS]

its a recall issue and software update, what happens is fuel pressure is lost at a crucial time and the engine dies but will fire up straight away and also injectors leak air and that's a recall as well

 

It's been in at a Citroen main dealer, they diagnosed a HP pump failure and whanted £900.00+ to fit a new one, shouldn't they have known about the recall??

 

The other problem is that it dosn't fire up straight away, you have to reset the alarm before it will start.