I need help with my C5 16v

[pdromoreira]

Hello!

I'm having problems with my car.
Sometimes, when i try to start the car the following happens:



What can it be?

PS: i have a LPG kit

[GiveMeABreak]

Hi and welcome.

I’m afraid that doesn’t help at all. You will need to get it diagnosed properly with a Lexia to determine the issues. The Service light and the MIL light were coming on if that was your video (?) and that indicates issues. You won’t know what these are until you have the diagnostic codes.

[pdromoreira]

Thank for the answer.

I already went to the workshop and they did not detect anything in OBD.
They said the problem might be linked to the LPG but the LPG installer also did not detect anything.

[GiveMeABreak]

A generic OBD is not going to cut it. PSA vehicle’s need a Lexia / PP2000 diagnostic hardware and software to properly diagnose them. I really don’t think there is much we can do without knowing any more. There are a million possibilities as to why it won’t start!

[pdromoreira]

Already been changed: sparks, air filter, crankshaft sensor and temperature sensor
With the warmer weather the car starts at first with no problems.

Another problem, I don't know if it's due to the same reasons.
After standing in a traffic queue, when I remove the accelerator foot, the rotations do not fall soon.

For next week I'm going to take the car to Citroen and ask for another diagnosis.

Until then, does anyone know the resistance values of the coil pack to miss this fault?

[wurlycorner]

That looks like the fuel pump isn't being latched on when the engine is running, so lack of fuel causes the engine to cut straight away.

Not familiar with the setup on a c5 (how it controls the fuel pump) but on an old skool ignition system, when the switch is in 'start' it puts a direct feed into the pump. That feed drops out when the switch drops back to ignition, but the pump is then held on via a feed from the engine ecu when it detects the engine running.
The switching between the two systems is managed by a relay.
If the c5 is the same, I would start there - check the relay, the contacts to it and check whether (on the occasions when it doesn't stay running) the ecu was providing the 'run' signal.

[pdromoreira]

Thank you.
I also don't know the C5 system, it should be more electronic.

When I turn the key I hear the pump working but after starting the engine it's harder to figure out if it continues to work or not.

[pdromoreira]

I found the following information on the internet:

Spark coil
supplier: SAGEM BBC 2.2
Primary winding resistance: 0.5 ?
secondary winding resistance: 12.5 k?

And the following FAE information:



I measured the values of my coil and the secondary winding gave 20.2k?.

Given the symptoms may be can be of spark coil?

[GiveMeABreak]

You really do need to get a Lexia on the car - as you have seen already replacing parts at random has not cured it.

[pdromoreira]

Yes, it's the best solution.
The desire to have the car ready is annoying

[pdromoreira]

Today was the Citroen and did not accuse any error.

But now start better

[GiveMeABreak]

Glad you have it sorted. If you want to post a video, just use a YouTube link and link to it in your post. We don’t all use Facebook and that link needs a log in.

[pdromoreira]

Sorry for the video.

Here is the movie on youtube



What I did in the car:
- cleaning the MAP
- cleaning the TPS plug
- additive for cleaning injectors.

[pdromoreira]

Good news lasted a short time.
Today the car began to sob, shake and rattles. After turning off and on the car returned to the same.
I had to call the trailer to take to the Citroen

[pdromoreira]

Today I was in the Citroen workshop and there were no fault codes in the car