Macan Diesel - Lowish Revs ; Engine Judder

[RSVP911]

Has anyone experienced a low rev / low speed engine judder in a Macan Diesel S - feels like the engine is mis firing / fuel is not getting through properly - I thought I was imagining it at first , then decided it was down to uneven road surface - but it's neither of these. Power seems fine though, just not a very smooth delivery under acceleration- any thoughts most welcome .

Booked into OPC on Wednesday - hoping it's nothing serious as it's out of warranty, which is annoying as it's only 2.5 years old. (I bought it second hand ; original owner didn't want to pay for the extra 3rd year) Cheers

Edited by RSVP911 on Monday 23 January 20:57

[Younez]

I had this on my Range Rover Sport and then started using premium diesel, after 2 weeks seemed to fix.

[bearman68]

EGR?

[RSVP911]

bearman68 said:

EGR?

?

[bearman68]

bearman68 said:

EGR?

Hehe,

EGR = exhaust gas recirc (valve) - a small valve that allows a exhaust gas into the combustion chambers to reduce speed of burn, and therefore Nox gasses. They carry soot, and when mixed with leaking oil from the turbo seals,cause a thick treacle like compound that jams the opening / closing mechanism on the EBR system. Symptoms typically include a vague misfire type symptoms on low load, and often a reduced power output. Sometimes it will blow white smoke and smell on bad combustion.
Typical solutions include changing the turbo, though some will say the system can be cleaned out with something like Terra clean. I'm not sure I don't have experience of this.
Personally I would temporarily disconnect the EGR valve - Engine management light will come on, and will go into limp (I would think) but it will tell you if there is a problem in the system on idle. (Had a scirroco exactly like this the other day). HTH. (!)

[paua]

I recently removed the entire EGR hardware ( blanking plate installed ) from my Landcruiser - was severely blocked & caused huge loss of power.

[bearman68]

Mmm, none of my cars has an EGR either.

[Pope]

From your description I would be looking at the 4wd transfer box (hang-on unit), seen a few now.

The clutch within the unit is dropped in instead of being applied progressively. If you are mech minded you can disconnect the CU on the hang-on and drive it - if the vibration stops you've diagnosed it; note you will log faults but if it's going in anyway...

If it is the hang-on unit you need to replace the vibration damper and the fixing bolts at the same time.

[RSVP911]

Thanks both for your advice - all very technical and slightly above my head, however it may come in handy tomorrow if the OPC don't get anywhere with it . I'm praying to the service gods that it's a simple repair

[RSVP911]

OPC say that the "Transfer Box" is faulty and needs replacing - Car is 2.5 years old. Cost roughly £2,500

[mackay45]

Covered by warranty?

[Sheepshanks]

mackay45 said:

Covered by warranty?

RSVP911 said:

(I bought it second hand ; original owner didn't want to pay for the extra 3rd year)

Where did you buy it (dealer/private) and how long ago?

[mackay45]

Sheepshanks said:

mackay45 said:

Covered by warranty?

RSVP911 said:

(I bought it second hand ; original owner didn't want to pay for the extra 3rd year)

Where did you buy it (dealer/private) and how long ago?

Sorry! That'll learn me.

Hopefully you can get some sort of contribution because that sort of part shouldn't be failing so soon, warranty or no warranty.

[wilkos]

This is a known fault on macans and porsche should offer significant good will
Towards the repair with it being just out of warranty and only 2 1/2 years old, as long as it's been serviced correctly.

If they don't then shame on then, and take to social media and slate them and see how long it takes for them to sort it out.
Most companies shut down bad social media pretty quick with good will gestures.

[RSVP911]

Thanks everyone - I bought it from a non Porsche dealer in Sheffield - can't remember the name : basically it was a brand new flipped car that I paid small overs on when they first came out - I didn't think to check the warranty length , but in hindsight , it makes sense that the original owner didn't pay for the 3rd year if it was a flipper.

OPC have been great and as stated, because this is a known fault and the car is still quite new , Porsche are covering the full cost which is a result ! Very pleased / relieved as they would be completely within their rights not to do this / only contribute.

Cheers

[Sheepshanks]

RSVP911 said:

OPC have been great and as stated, because this is a known fault and the car is still quite new , Porsche are covering the full cost which is a result !

Bearing in mind the circumstances in which you acquired the car I think you've been very lucky there.

[chrisABP]

RSVP911 said:

Thanks everyone - I bought it from a non Porsche dealer in Sheffield - can't remember the name : basically it was a brand new flipped car that I paid small overs on when they first came out - I didn't think to check the warranty length , but in hindsight , it makes sense that the original owner didn't pay for the 3rd year if it was a flipper.

OPC have been great and as stated, because this is a known fault and the car is still quite new , Porsche are covering the full cost which is a result ! Very pleased / relieved as they would be completely within their rights not to do this / only contribute.

Cheers

That's a result Richard! Think maybe your good relationship with your OPC might have helped but still a great solution from Porsche.
My wife's X5 had a huge list of stuff replaced whilst under manufacturers warranty including transfer box, both turbo's (at different times!), prop, driveshafts, brakes, full set of wheels (surface corrosion) so nothing surprises me anymore with new cars!

[RSVP911]

chrisABP said:

That's a result Richard! Think maybe your good relationship with your OPC might have helped but still a great solution from Porsche.
My wife's X5 had a huge list of stuff replaced whilst under manufacturers warranty including transfer box, both turbo's (at different times!), prop, driveshafts, brakes, full set of wheels (surface corrosion) so nothing surprises me anymore with new cars!

Wow that's a long list Chris. Yep I think purchase history with Porsche in general may have helped . How's the 4 ?

[chrisABP]

RSVP911 said:

Wow that's a long list Chris. Yep I think purchase history with Porsche in general may have helped . How's the 4 ?

It was indeed a long list Richard, to be fair being in the industry I was very picky during its warranty period but all work was required and never questioned. The car is now 6 years old and has been faultless since!

Other than setting the geometry, changing the oil & filter and giving it a good clean I've hardly used it as the weather has been awful. In the few times I have driven it I've enjoyed every moment, love the gearbox, the interior, the exhaust note (maybe it needs a little help...), the PCCB brakes pedal feel and the feeling of it being much narrower which makes it more usable on local back roads. The 997 GTS always felt wider at the rear than it probably was! Can't wait for some dry roads and getting to know it better...

[RSVP911]

chrisABP said:

It was indeed a long list Richard, to be fair being in the industry I was very picky during its warranty period but all work was required and never questioned. The car is now 6 years old and has been faultless since!

Other than setting the geometry, changing the oil & filter and giving it a good clean I've hardly used it as the weather has been awful. In the few times I have driven it I've enjoyed every moment, love the gearbox, the interior, the exhaust note (maybe it needs a little help...), the PCCB brakes pedal feel and the feeling of it being much narrower which makes it more usable on local back roads. The 997 GTS always felt wider at the rear than it probably was! Can't wait for some dry roads and getting to know it better...