508 initial cold revving sounds awful

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c4guy
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508 initial cold revving sounds awful

Post by c4guy »

So my 508 hsas been sitting a couple days and when I started it today, i could hardly get it to rev from idle. It seemed to rev ok above idle, if I kept the turbo lit. I have a soundbite but don't see any way to add it here.
Could it be that the start/stop battery, which is as old as the car(2013) is done and me leaving the car for a couple days, then starting it, the battery could not give the power needed by the injection pump to pump diesel in from idle?
problem goes away when car has been driven a while/ warmed up.
No fault codes in torque with bluetooth obd. Couldn't get wifi obd to talk to torque.
only have a very old lexia.

Here are the fault codes from PP from the engine ecu:

HDI_SID807_BR2 Fault reading

P16A3 Control unit
Properties
From . Local .
Status . Intermittent .
Fault characterisation Monitoring fault on the starter inhibitor (level 2)

P0685 Power relay control.
Properties
From . Local .
Status . Intermittent .
Fault characterisation Open circuit

No ECU faults after clearing.

Also these faults which will not clear:

Built-in Systems Interface (BSI) BSI2010
B1003
Configuration fault
Properties
Cause Local
Status Temporary
Characterisation -


1
Matrix screen integral to the
instrument panel
MATT_M_2010
B1003
Secure configuration fault
Properties
Status Permanent
Characterisation of the fault Not characterised
1
RD5 radio RD5
B1003
Secure configuration fault
Properties
Status Permanent
Characterisation Not characterised


Thanks for any help.
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Re: 508 initial cold revving sounds awful

Post by GiveMeABreak »

VIN please...
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Re: 508 initial cold revving sounds awful

Post by c4guy »

Here's a link to a short video, notice when I press accelerator gently, there is no issue.


Thanks.
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Re: 508 initial cold revving sounds awful

Post by GiveMeABreak »

Ok so you have the DV6C 1.6 variant with Continental / Siemens SID 807 injection System.

Fault P16A3: Control unit: Monitoring fault on the starter inhibitor (Level 2)

This means there was an internal fault detected in the Engine Management ECU for 500ms.
Conditions of Fault: When engine is running.
Disappearance of the Fault: Driving for 5 Minutes
Downgrade mode: The Start Stop system will not automatically restart the engine - you must restart it with the key.
Symptoms: Jerking / Stalling, Starting Problem, Lack of Power
Suspect Areas: Engine Management ECU.

Fault P0685: Power Relay Control - open Circuit.
Description: Electrical fault detected for 5s.
Condition for Fault:Ignition on or Engine Running.
There are no downgrade moes for this specific fault.
Symptoms: Jerking / Stalling, Starting Problem, Lack of Power
Suspect Areas: Power relay, Electrical Harnesses or Connectors.

Fault B1003 (BSI): There is not specific error except to say it means there is a configuration fault in the BSI. Something has been changed in the BSI or one of the other ECUs that also get written to the BSI and the entry or configuration parameter is not correct most likely. See Following:

Fault B1003 (Multi-Function Screen): Configuration fault.
Description: Configuration of one or more parameters not correctly or not completely performed.
Conditions for Disappearance of the Fault: The configuration has been carried out successfully.
Symptoms:No display, or incorrect display of the data, or the screen will not turn on or turn off.
Suspect Areas: Multifunction Screen / or incorrect configuration.

So you obviously have PP2000 - have you changed any settings anywhere - specifically those related to the Head Unit o the screen? The last 2 errors will be related as they are written tot he ECU Head unit and also the BSI, hence the 2 faults and the reason why the BSI knows something is wring, but is not related to the BSI itself.

The main fault would certainly seem to be with the Stop Start system and would seem to indicate the starter inhibitor is not working properly. It could also be the result of that mechanical noise in your video.
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Re: 508 initial cold revving sounds awful

Post by c4guy »

wow, All that from those codes.

It's diagbox, not PP2000.
Never did anything other than clear faults, and only cleated the faults to see if they would come back because of the revving from cold issue

The ECU faults cleared ok and never came back.

Start/Stop works ok.

Fault disappears when engine warm.

Old dealer note in along with manual saying hesitation in car, no faults, but reprogrammed injectors and apparently fault went away. previous owner says they never had anything like this.
But, if car was warm when mechanic took it for run after reprogamming injectors, the fault would have disappeared anyway.
Previous owner would have been hyper gentle with the car, and hardly used it cos it has less than 17000 miles on it.
When I got the car, i gave it a good run and also did the reset of the gearbox thing - start from standing start, and take off quick, making car rev all the way up till it auto changed, right up till 4th gear.

So what could cause this kind of fault that doesn't show up in diags AND goes away when warmed up?

Thanks again.
Last edited by c4guy on 26 Aug 2019, 16:19, edited 1 time in total.
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Re: 508 initial cold revving sounds awful

Post by GiveMeABreak »

c4guy wrote: 25 Aug 2019, 13:48 Here are the fault codes from PP from the engine ecu:
I know It's Diagbox given the year - was just quoting you^ :wink:

Anyway - to answer your question, something that does not result in a fault code being triggered - or that may not in itself have an ECU or sensor attached to an ECU. It does sound a bit rough... Maybe you need someone to revi it whilst you are recoding a video in the engine bay to try and hone in on the area...
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Re: 508 initial cold revving sounds awful

Post by c4guy »

Nothing of note in the engine bay other than it can be heard better.
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Re: 508 initial cold revving sounds awful

Post by GiveMeABreak »

Ok, so from your video - although you were whizzing about a bit quick, it certainly looked like the Dynamic tensioner roller - I may be mistaken, but it did seem to rattle in unison - I've marked it in yellow:
508 Tensioner Roller.PNG
and below is the part - item (4). You have a reversible alternator on the vehicle. I know there was another member who had an issue with his - let me try and find it....
508 Tensioner Roller 2.PNG
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Re: 508 initial cold revving sounds awful

Post by GiveMeABreak »

Now I'm not so sure.... looking at the video clip in the thread below, it may be just coincidence.

Here's the other thread, the video clip is on page 2 half way down.

viewtopic.php?t=61488
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Re: 508 initial cold revving sounds awful

Post by c4guy »

Hi,

That seems to be a different issue, there is no squealing of belts with me.
I just kept the video on that tensioner cos it showed what the engine was doing same time as sound.

If it was same issue, the same issue would be there with engine hot or cold but my issue goes away when engine hot.

Thanks.
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Re: 508 initial cold revving sounds awful

Post by c4guy »

This morning, no fault at all, started the car from cold both times.
Either it is outside ambient temperature related, a bit colder outside today, or, intermittent fault which is a pain if it is.
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Re: 508 initial cold revving sounds awful

Post by c4guy »

And the fault is back this afternoon.
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Re: 508 initial cold revving sounds awful

Post by RichardW »

I would suspect this is one of the injectors beginning to give out, not uncommon on DV6C engines.... Try checking the live data on injector corrections in Diagbox as you rev the engine and see what it shows.
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Re: 508 initial cold revving sounds awful

Post by c4guy »

hi,

how do i get to that screen and what should I be looking for?

Thank you.
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Re: 508 initial cold revving sounds awful

Post by RichardW »

Go into the Engine ECU, and then 'Standard Parameter' measurements, then injection of similar, and you should then be able to see what corrections it is applying to the injectors. Is one (or more) different from the others? Does one of them significantly change as you rev the engine when it coughs? You might also be able go into custom (I can't remember the exact words) parameters and this might allow you to graph the corrections. I would also look at the live data for the EGR valve - does it respond quickly to requests, and is the output position stably tracking the requested position?
Richard W
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