Engine is shaking in some situations with DTUK - CRDT?

[Havsgaard]

Hi

Note: tham I am driving a manual 6 speed 2.0tdi 150.

Lately I have done some observations in various situations, depending of the setting of CRD-T(trevor), and I would like
to know if I’m the only one who has experienced this or if you have experienced similarities.

When it happens, it feels like the engine is shaking, and you can feel it in the whole car and you instantly loose torque.
I have had situations in 6th gear, running about ~95 km/t (60mph), and I overtake without shifting down to 5th, but accelerating,
then suddenly the engine shakes as if it is not getting enough fuel/pressure – extremely unpleasant. The engine temperature
doesn’t seem to matter as I have experienced it a few times when I have been driving for more than 1 hour.
I would say that it happens when you are putting more load on then engine during acceleration, like going slightly uphill, doesn’t even
need to be steep – just slightly.

So far I have only seen it on Map 3+2, whereas I have now changed to Map 3+1 again.

To a very little extent, I have noticed similarities on Map 1+1 and 2+1 when starting from a total stand still in 1st, there’s a small judder,
but no where near what it feels like when you are cruising at 95km/t.

Perhaps some of you with more technical insight might be able to explain what could be happening and why?

I have an ELM327 unit and no fault codes is showing – nor is any of the sensor reporting something bad, so my suspicions is targeted
towards the setting of CRDT/Trevor.

This might be a coincidence by different things, but I know that when I had just fitted the box, I also noticed it once up-hill.
This was before I even tried to floor the pedal, which I havent been doing much of anyway and very rarely does - so it could be a
fault of the gear box/engine which could would have come in any case - box or not box mounted.

 

[GrahamFR]

sounds just like a DMF shudder to me, which is not good news on a new car, HOWEVER something is niggling me about a shudder and dtuk box and something to do with the settings, so contact Andrew but im sure i read it on here. Until then, gear down and you wont be doing any extra harm.

 

[Havsgaard]

sounds just like a DMF shudder to me, which is not good news on a new car, HOWEVER something is niggling me about a shudder and dtuk box and something to do with the settings, so contact Andrew but im sure i read it on here. Until then, gear down and you wont be doing any extra harm.

DMF that is only DSG gear box is it not?.
Any ways, I have updated my request to reflect the exact car model

 

[GrahamFR]

you are thinking of a dual clutch, this is the flywheel and manual cars have them. Diesels, with their low down torque are more effected than petrols

Example...

http://www.pistonheads.com/gassing/topic.asp?t=904776

 

[GrahamFR]

http://www.seatcupra.net/forums/showthread.php?t=403919&highlight=dmf

 

[Havsgaard]

Ill read up on the flywheel thingie - could be that i get a little smarter
Thanks for the hints so far.

 

[KohlWagon]

2010 TDI SW 6 speed....I had a very similar shaking that I thought was the DMF. It turned out to be the intake manifold flaps stuck in the closed position. The shaking was from overfueling(tuned with heavy fuel map). Mainly would happen in 5th/6th under heavy load. Same situation that would cause DMF to shudder, but upon unplugging the intake manifold, the shudder completely disappeared. Now my DMF was no good as well, as it broke recently , , but the shudder you describe was gone once intake flap motor was unplugged.

It's free to unplug...I had everyone swear it was the flywheel, which I know is the weak link, but no matter how much I tried, I couldn't get it to shudder when the manifold was unplugged.

Not saying it isn't the DMF, but can't hurt to try the free option first.

 

[Havsgaard]

The fueling part sounds plausible - as i also mentioned, i have slight judder when starting in first, on map 1 and 2, but not on map 3 in 1st gear. And this is a delicate start, very slowly, and always possible to reproduce on cold engine running map 1 and 2. If that part was a dmf fault, i would suspect that it would be reproducible in all cases no matter what map i used.
I havent been able to reproduce the judder during the last two days running map 3+1, so far around 200km.

 

[GrahamFR]

which is why im hoping i come across the dtuk comment about settings and judder, maybe it wasnt on here...

 

[Havsgaard]

which is why im hoping i come across the dtuk comment about settings and judder, maybe it wasnt on here...

Perhaps this thread
http://www.seatcupra.net/forums/showthread.php?p=4341936&highlight=judder#post4341936

 

[Jamie_T_APLBMX]

I've got this in mine. 2.0 tdi. 6speed manual. The cars just come back from Darkside developments for some work as I thought the flywheel was going. Turns out the flywheel was ok. It was the gearbox doing all the juddering. The input shaft had developed play. New gearbox time for me