[LvR]

Given everything in the description of the experience, I am going to guess/bet the injectors have absolutely nothing to do with the problem .......................

............... and imo any "issue" with "injectors" (or indeed any other instrumented parameter like the mentioned throttle) will undoubtedly be picked up by a CLIP or a proper Renault speaking scanner and a semi-intelligent/competent person looking at engine parameter logs for a typical trip where the "problem" is experience/heard/demonstrated.

There are situation where the noise is not present and that is when I would drive the car for the longer distance without turning the car off, also the same was when I would drive the car and the AC would be turned on the noise was not there any more.

This behaviour makes me wonder about the sprag clutch (freewheeling) on the alternator

 

[LvR]

I really think you need the help of a CLIP or a proper Renault speaking scanner .....................

Subjective noises and experiences are going to be virtually impossible to sort without the ability to properly quantify the properties of it ito something the ECU can understand.

50rpm idle speed fluctuation could be normal depending on what the ECU is trying to do or compensate for

 

[LvR]

If the "noise" is easily repeatable/reproducible can you not record it happening and post the video here?

For S+giggles - post a video of your engine starting when ice cold and when it is at normal operating temperature - do not touch the throttle - in each case allow the engine to idle for about a minute.

On a diesel ..................... if you suspect injector issues, then its as simple as inspecting injector compensation values and the behaviour of the fuel pressure ............ over-fueling due to leaky/funky injectors can and will produce your symptoms, however as I said before when I responded to in particular

also the same was when I would drive the car and the AC would be turned on the noise was not there any more.

The injectors know nothing and don't care about the AC (also the other way round) and I, therefore, fail to see how that association can be made despite your reported experience....................

Can you confirm you simply will NEVER have the "problems" as long as you keep the AC permanently on?

If you want to get to the bottom this now after the guarantee expired then IMO you will have to tackle the issue by describing the "perceived" problem in terms of ECU controllable parameters with a CLIP

 

[LvR]

I'll record it tomorrow, the cold and warm start up just like you mentioned after about 1min idling. I'll also record it while driving and as far as the AC, I noticed from the cabine that there was no noise but I haven't been driving the AC always on.

No - maybe I didn't express myself properly - video for a duration of 1 minute from startup, not after 1-minute idling - iow - start recording video, start the engine without touching the throttle, keep recording for 1 minute....................

 

[LvR]

This is exactly why I asked for actual video so one can try and experience what you hear and cut the subjectivity...........

Perhaps one of the Renault specific diesel gurus can also chime in .................. FWIW this is my opinion:

I highly doubt you are actually "hearing injectors" ........................ the cold start has IMO a slight "tappety" sound to it that is not present in the warm startup (possibly normal with hydraulic lifters and perhaps non-optimum oil but who knows) - I can hear absolutely nothing that will make me rip into injectors specifically in either of those 2 videos. What I do see in the cold start video is the appearance of a possible engine temperature related issue - read EGR mechanically not sound/dirty/stuck or coolant temp sensor funky or MAF/Map issue or fuel pump modulation funky ..............

Re the Nissan video (and by deduction what you experience sometimes) - I would go for the EGR without any further evidence or history................ what you hear on the Nissan video is imo possibly lugging/knocking caused by improper mixture control (?).

If you intend logging (and IMO you do) you really need a Renault speaking scanner that can access ALL the engine parameters at the same time and log them to a file for extended periods - I am willing to bet your car scanner app will not have access to any non-EOBD parameters .................. stuff like injector compensation values etc etc etc .....

Without a simultaneous log of ALL the engine control parameters, you are going to be tearing your hair out and possibly spending tons of beer money on the wrong stuff.

MP3 files will have to be archived and attached I think

 

[LvR]

There is of course also the question of a DMF presence (dual mass flywheel) ................... you 100% sure its not perhaps a worn DMF you experiencing

 

[LvR]

Thanks guys for the quick reply. I mentioned before the noise is not there when the engine is idling or if I rev it while in neutral. It appears while you shift in the first and start driving, reverse and all the way up to third gear. But like i mentioned it is the same as the Nissan on the video.That is why I wanted to upload the audio files of the noise while driving. But it says it is not the file doesn't have an allowed extension. I tried with mp3,m4a and was files and nothing works.
I used a regular attachment icon on the bottom. Is there anyother way of uploading it?
I might end up at the mechanic on Friday, would the EGR or MAF issue be visible on Clip? Also if those would be an issue wouldn't there be any warning light popping on on the dashboard?

Sorry was off sorting power issues here so only get back here now.

Word of caution re CLIP and expectations of the info it supplies:

Clip or any other Renault speaking scanner will not necessarily indicate/identify a "problem" by telling you about it using words to understand - CLIP et-al is basically ONLY following the logic the Renault engineers programmed into the ECU to generate complaints. Example - if a specific parameters value currently measured on the engine falls within the expected allowable RANGE of values it will not complain. Complaints can be generated when eg the value of a parameter falls within the expected range BUT the current value of another parameter at the same time is such that the ECU is made to believe the 2 values in combination is not a possible state .................. and its here the problem with the scanners/CLIP lies - not every conceivable suspect state/combination is programmed into the ECU so it's not possible to necessarily generate a warning for EVERY operational state on the engine - THIS is the most important thing to get your head around - there may be something "wrong" and its possible CLIP will not or can not tell you anything about it.

This is where a logical and trained technician that understands all intricate parameter value interactions get to shine - he needs to look at the logged data values of all the engine parameters at the time of the engine's supposed misbehaviour and see what are suspect parameter value combinations....................... hence my suggestion to get a proper Renault speaking scanner and log ALL engine parameters for a typical trip where you experience your issues

You can be sure of this though - throughout development time the engineers have made sure engine destroying parameter value combinations got built into the ECU and warnings will be generated for those - both on the dash of the vehicle AND in CLIP .................. so if there are no warnings on either the dash or CLIP chances are the issue you experience may be a drivability issue to be traced and addressed by the mentioned technician - more often than not its here that brands/engines get a bad reputation because of incompetent/clueless humans.

Sorry - any component like the AGR/MAF/DMF/whatever is well documented and a search on the forum and the NET using those terms will explain the basic operation of those - the more intricate details require volumes of text and I just don't have the time to detail it all on a forum like this - most of these items are too complicated to point a finger at by JUST looking at the vehicle with CLIP and not seeing any complaints - you need intelligent and competent human intervention from somebody that understands this particular post's implications and that will not approach the issue from a dealer's standpoint only

Your links still aren't working btw

 

[LvR]

LvR, thanks for the explanation and patience. I just got to excited with all the info.
I'll take some time today and do some digging arround.
Here is another chance for the audio files. Hope it works. Please use the head phones for it will be easier to hear.

Google Drive: Sign-in

Access Google Drive with a Google account (for personal use) or Google Workspace account (for business use).

drive.google.com

You are really taking things slow with those 3 clips, and what I only think I can hear is basically DMF noise ............... I would start there

 

[LvR]

If you really drive it like you stole it and take off with lots of power is the noise better/gone?

 

[LvR]

😁😁😁 ur right, I am no Ken Block. It take it slow. But u are right if I add more gass I can't hear the noise

Absolutely nothing wrong with that ..................

but

..........................
One thing I did notice, if I start driving off with the bit more gas the i can't hear the noise. It is more evident when I have a soft start up, you know not pressing to much gas. I hope I have explained it good.

Makes me point a finger at DMF as a first reaction


..............and a failed DMF will not necessarily always cause vibrations

 

[LvR]

Is there a way for me to check it, is it easy access? The noise is also there in higher gears and higher revs, sometimes it quiets down arround 2k sometimes a bit higher and sometimes I don't hear it at all in higher gears. If it is DMF could it be that it calms down at certain rev range?

Without already knowing that the DMF has failed its impossible to answer specifically - in general all of your questions is quite possible with a failed DMF depending on what went wrong (broken spring, worn bearing, crack, warp etc etc etc etc) ............... and no sure and easy way to check other than physically replacing the thing if no other obvious faults are to be found

 

[LvR]

Thanks again, will mention that to the mechanic when I go. What about loss of power while driving? Could that affect that too?

No that's a different issue and engine-related - need a scanner

 

[LvR]

Sometimes the faults won't show on any Renault speaking device. But after doing some testing via Tourqe Pro (best I could do). Both my EGR bank 1 was at fault and one of my glow plugs.

I disagree - Glad you sorted yourself via Torque Pro but I am willing to bet both CLIP and any other proper Renault speaking scanner will give you the exact same ability to identify the EGR and glowplug too ................ because the ability to identify those is actually built into the ECU and its not a function of (especially the plain EOBD enabled only) Torque Pro

 

[LvR]

Don't faults also lit up on dashboard, or only the permanent ones? If the intermittent fault happens would OBD2 scanner plugged in during drive pick them up? I'm asking since the jerky engine and power loss happens during driving and I was thinking of having the OBD 2 plugged in i just don't know which paramenter to oversee.

You still don't get it.

This is exactly why I asked for actual video so one can try and experience what you hear and cut the subjectivity...........


If you intend logging (and IMO you do) you really need a Renault speaking scanner that can access ALL the engine parameters at the same time and log them to a file for extended periods - I am willing to bet your car scanner app will not have access to any non-EOBD parameters .................. stuff like injector compensation values etc etc etc .....

Without a simultaneous log of ALL the engine control parameters, you are going to be tearing your hair out and possibly spending tons of beer money on the wrong stuff.

Simple terms - you don't have a Renault speaking scanner - you have an EOBD scanner that is ONLY looking at emission-related parameters, so even if you do know (and nobody knows) which parameter to monitor, you cannot do it even if you wanted to

 

[LvR]

OK - What I then don't get is that if you are taking it to this guy and paying for the guy to fix it, and you are also willing to pay for his time to drive with you, why are you in this situation?

Is it a question he is plain incompetent ?......................

 

[LvR]

Having the same issue

WHAT same issue....................?

Was the subjective sound of the engine's "noise" NOT there before injector replacement?
WHY was the injector replaced?
Was the injector replacement accompanied with an ECU software update (quite normal this that often can change perceived engine sounds under different conditions ) ?

No use asking about feedback - like we said before - get a Renault speaking scanner and investigate the thing yourself - if there are no errors getting flashed on the dash chances are the dealers are correct in saying its normal (ito the current ECU software performance anyway) despite your own opinion.

If the individual cylinder injection compensation values are close to zero with only a small difference between cylinders there is little to nothing to do imo