Hi guys, as an owner of a MK3 superb, 2.0tdi 140kw, i opted for a standard remap, all done as it should, but the car was not any "faster" then it was before, comparing to other stock 2.0tdi mk3s or a passat, so obviously something was wrong, measured it via an on wheel measuring device, not sure how its called, and it showed less then 187bhp, which is factory, so had the tuner redo the "magic" and it should work.. But still the car felt nothing more responsive then it was, the measuring device he uses depends on the mass of the vehicle, and only after entering a total mass of 2.000kg we got around 220bhp and around 460nm of tourqe.. But that didnt seem right, the car is rated at 1600kg per registration papers, so i went to weigh the car, turns out its merely 1820kg with 2 adults and a child in the car.. So then i went to do a dyno run instead of messing around with the tuner, the incorrect measuring device..

At the dyno run, it turns out the car has barely 200hp and 415nm of tourqe.. 

The man running the dyno is well known for his tunes, and car knowledge, he claims that every 5th car coming there, onwards from 2015, being VAG and TDI has a known fail of the charge cooler, symptoms low hp, often regeneration of the DPF which i have noticed, and some increase of consumption, which i have also noticed, used to be around 6 to 7 liters/100 km up to almost 9l/100 km now.. He also advised me that running the car like this will not harm the engine, but will lead to total DPF failure, as he also checked the soot value, car did a regeneration 5kms before the dyno, already had 1.9 gram inside!

Called my main dealer, price asked for the cooler and work is around 2000eur!

Called my local garage, they claim if no coolant leak, its not the charge cooler, upon advising them i have a sluggish car, and after telling them the whole tuning story, they claim DPF clogging, but would that not get me an error code?

 

Car has been scanned by multiple garages, main dealer, my buddy with vcds, and i did it myself as well with OBD11, no errors at all on any modules! But i was told that charge cooler does not throw up an error code, as it has no sensors on the ouptut part, only on the input..

 

I am at a loss now, as the price is far to great to be guessing, how can i tell if its the charge cooler, should i look at the DPF, EGR, where do i start with an underperforming car with 0 (zero) faults!

Edited 11 January, 20224 yr by bubib5

are you saying regens are happening with 1.9g of soot, regens  normally only happen when the soot level gets to 24g.

what is the ash level in the dpf ?

1 hour ago, 310golfr said:

are you saying regens are happening with 1.9g of soot, regens  normally only happen when the soot level gets to 24g.

what is the ash level in the dpf ?

Nope, im not an english speaker, so might have formulated it wrong, im saying that after a regen and only 5km the car already had 1.9g, he did check the ash as well, but that has sadly not been memorised by my silly brain 😞
I am at a loss here, as a few more calls later, apparently its a know thing on golf 7s as well..

as i said, regens normally happen when the soot level gets to 24g and after the regen has finished,  the soot level will drop to 5.5g or thereabouts.

are you then getting the soot level rising 1.9g every 5km [ 3 miles ]  after the regen ?

 

you also really want to know the ash level in the dpf as well,   this will tell you how much life is left in the dpf

 

to see the soot and ash levels without using vcds or obd11,  get yourself the vag dpf app and use with your phone, it's more convenient

 

Edited 11 January, 20224 yr by 310golfr

27 minutes ago, 310golfr said:

as i said, regens normally happen when the soot level gets to 24g and after the regen has finished,  the soot level will drop to 5.5g or thereabouts.

are you then getting the soot level rising 1.9g every 5km [ 3 miles ]  after the regen ?

 

you also really want to know the ash level in the dpf as well,   this will tell you how much life is left in the dpf

 

to see the soot and ash levels without using vcds or obd11,  get yourself the vag dpf app and use with your phone, it's more convenient

 

Well, from what i was told it should have not gotten to almost 2g after only 5km (3miles) of driving, after a completed regen, but who knows..

Ill check the levels tomorrow morning with my OBD11, as im not sure my obd adapter will work with vag dpf app, at least its not listed as working with OBD11 adapter..

Will report once i have the info! Thank you for your input, and for trying to help!!

@310golfr there you go, not sure about those ash levels, is that a shot dpf or?

Looks like your dpf only has around  25 g of Ash, so there should be plenty life left in it.

 

Problem is the regens are too often.

9g of soot after 48km (30 miles) 

 

= a regen every 130km (80 miles or so )

 

Even with lots of stop starts and a cold engine, ie  all town driving, you should get around 180 miles before the car regens.

 

Was told also that those 9g are calculated, and that measured is the real value, but both are conserning, i was thinking of trying to remove the dpf, straight pipe it, code it out, just to eliminate it from the equation, to see if indeed its the dpf, as its was easier then trying to get to the charge cooler..

charger cooler have to be cleaned, but its temporarly fix. only solution is new chargercooler and secondary egr off..