Hello,

This is my first time posting on this forum, so please be gentle if this is an old chestnut of a question. 

 

I carried out an engine oil and filter change yesterday, using Mercedes Benz 5W/30 Low SAPS 229.51 oil that was newly purchased for my Mitsubishi 8 weeks ago and unopened and a new Bosch oil filter and 3 seals. 

 

My question is this; my 1.6 tdi 2014 105 bhp seems noisier than prior to the change.

This oil has the equivalent specification of VW507.00/504.00 and has served my previous diesel engines very well but have I done wrong here?

I am a qualified mechanic of over 40 years and have never had a VW diesel in my life, so I will certainly take on board any constructive criticism. 

 

I have only owned the car 6 weeks and I thought it noisy around 1500rpm as soon as it was up to temperature upon gentle acceleration but thought this may be normal for this engine.

I contacted the previous owner and he said it has been noisier since it had its emissions fix in 2017.

The engine also gives a kick as soon as I gently touch the accelerator after coasting and again as I remove my foot from the accelerator to slow down etc.

It feels as though an engine mount has broken or gone soft but this issue does not happen until the engine is up to 90C and the oil is over 60C+.

I've had the timing belt, tensioners and pump renewed as although the engine has only covered 31,000 miles it was a few weeks over 5 years old when I purchased it.

Is this initial 'snatching/quick jerk' a known issue, or have any other owners had/have the same, or similar issues please?

The accelerator pedal has absolutely no free play whatsoever, which my other diesel 'fly by wire' vehicles have had.

If I change the pedal/sensor assembly for the same part number, will I need to have the pedal programmed into the ECU, as this question has many contradictory replies online?

Sorry to ramble on but this Spaceback is absolutely immaculate with full Audi main dealer servicing and I just want to get it to run as smoothly as possible. 

The temperatures are all absolutely fine and treating it to 56mph runs on the A road to work, it manages 76 to 90.3mpg according to the dashboard. 

The reality overall has been 73.3mpg with mixed driving since ownership, so overall it's a lovely drive.

 

Many thanks in advance (if anyone is still awake).

I'm surprised no-one has replied to this one.

 

The key phrase in your post, for me, is where you refer to the emissions fix, and I can't help feeling there may be a connection.

 

Before having my 2012 1.6tdfi 90 fixed I did some internet research, and having found the problems people were having I decided not to go ahead (loss of low-down torque, EGR failure, DPF failure, increased frequency of limp mode and so on)

 

Is it worth your doing searches for up to date information? There's thread somewhere on this forum, however its a long time since I've looked, and I can't find it now.

Hi and thanks for your input.

I have searched for hours and hours and have found that the noisy engine at low revs, DPF regeneration and lack of (or frighteningly zero) pull if trying to cut in to slow traffic flows roundabouts, are all symptoms that some owners have had since the emissions scandal fix.

Unfortunately it seems that VW totally deny that the fix causes these issues and as we all know, are banned by 'da management' to reverse the software to its original state.

I've bought VCDS full version and VAG171 cable and will carry out throttle valve and TPS resets and if the engine 'kick' at tiny throttle opening and closing doesn't improve, I will have to consider a full ECU reversion with a private company known to have the original codings I guess.

I now have a new boxed throttle pedal assembly and am still trying to establish the necessity of coding the new pedal/ tps but can't get a definitive answer.

Some say there's no need as long as it's the exact part number, some say it won't give a signal above about 82% and some say it won't do anything but idle or idle at 1200 to 1500rpm.....................help? 

No coding required for a pedal. It’s just a sender. 

Thank you for your reply.

If that's the case, I feel happier renewing the pedal assembly just in case there is a fault with the sender track.

Cheers

Should be a Hall effect sender so no track so to speak. 

Thanks Tech1e.

I am trying to carry out a throttle body alignment with VCDS prior to changing the pedal assembly but the option following    01 Engine  04 Basic settings isn't available in the drop down menu. It shows Throttle Body Adaptation under Advanced Measurements but it only shows the voltages..........any ideas please?

It's a CAN 2014 1.6 tdi CR engine (CAYC).

 

no basic setting required. The throttle body has nothing to do with the throttle pedal. 

Thanks for the quick reply. 

I would still like to do anything tba due to the engine jolt/kick at initial gentle touch of the pedal when in stop and start traffic. That's why I bought the new pedal assembly to try out.

On Ross Tech it says to carry out a tba on the CR tdi whenever the throttle body is cleaned, changed or the throttle pedal is disconnected or changed, hence my question.

I need to ascertain why VCDS won't carry out the required operation.

Diesels don't have a throttle, there is no throttle to align.

 

The only thing that resembles a throttle butterfly is part of the egr function and doubles as an anti-shudder valve

Can you tell me what this part is just before the inlet manifold. 

It's listed as a CAYC 1.6tdi CR throttle body and is the same part on my 2014 Spaceback...............confusing. 

21 hours ago, Blaenrhondda said:

Can you tell me what this part is just before the inlet manifold. 

It's listed as a CAYC 1.6tdi CR throttle body and is the same part on my 2014 Spaceback...............confusing. 

 

I've already told you what it is, it has 2 functions to my knowledge and I agree it is confusing if you don't know much about Diesels:

 

• Closes when you turn the engine off to give a nice clean shut down of the engine without it being lumpy and shaking the car to bits

 

• On part throttle it will close by an amount decided by the ECU, this creates more vacuum on the exhaust side of the EGR to promote more exhaust flow into the intake.

 

 

Edited 8 August, 20196 yr by SuperbTWM

Well it's still called a throttle body under the part number on all parts websites.

Im well aware of the fact that it has 2 functions and that the EGR transfer pipe feeds into it and it's an anti shudder valve of sorts but that is not my issue. 

VCDS Ross Tech website and instructions still call it a throttle body and VCDS is programmed as such for adaptation purposes. 

My issue is that the process only shows the fully closed and fully open voltages and the registered maximum variations.

I have been using Autel MOT Pro, Maxicheck Pro and Delphi Cars for many years and it's only this software/cable configuration that is giving me a hard time.

Whenever I attempt the learning process the software gives a Throttle Body Adaptation Not Running TBD message and it then sets a PCM fault code with a flashing glow plug light on the dashboard. 

This erases immediately and doesn't reappear until the TBA process is attempted.

So, whatever part you wish to call it is immaterial;  adaptation following cleaning or replacement is still supposed to be able to be carried out.

However, I have found the answer to  this earlier today.

The car has a 56 fault code listed that relates to N/S/R Bass Speaker Open Circuit and until this is repaired and cleared, the Ross Tech software will not carry out adaptations.

Thank you for the information though..........most kind.

Glad you got to the bottom of it, has it fixed your jerking issue though?

Unfortunately I am not in any fit state to get in to door card removal, sitting in the car with my laptop is fine but I've had to double up my heart drugs 3 days ago but will look at the speaker to see whether it's one of the gold thread type wires that has broken, or if it's in the sub loom itself.

I don't have a spare bass speaker but have asked a breaker whether the Rapid he is breaking still has one.

Unfortunately, until the speaker fault is cured, the code cleared and 1 ignition key cycle is completed, VCDS is not going to do very much other than act as an OBD reader and fault code eraser.

Thank you for your advice and for caring.

Cheers