car would not go over 40mph

[martin1810]

You've answered your own question. Just follow the info that you found. Check and clean all connections/earths especially at ecu and MAP sensor. If that doesn't work see VW about a loom change and possible software update. Get the update done before the loom as that may fix it.

[paynes1]

Problem seems to be solved since loom replacement.

Thanks to all

[Lethalvenom]

Just had brand new dual mass flywheel and brand new clutch pack.
Direct from darkside developements
Brand new dsg gearbox oil and filter also.
Then a remap.

To find that it already had a remap on it.
So the tuner just enhanced the currant map.
And coded out egr an dpf ect.
Dpf is smashed out.

Driving it is fine it now dont have the judder no more due to old flywheel being ******.
But i noticed it wont go any faster than 115mph.
Which i find strange as it dont have a limiter on it.
Its fine getting up to 115mph but struggles to go past that.

Its been plugged into and has no codes ect also no error msg or lights on the dash to suggest any faults.
It was checked whilst in for remap an again no codes or faults ect.

I replaced the maf sensor with a brand new 1.
Still the same issue.


I have it booked in to a gearbox specialist in 2weeks just to have them run a diagnostics on it to see if they are able to find any faults.
I will also ask them to check the mechatronic unit just in case as ive heard that somtimes this can be the issue.

Apart from that am i missing somthing.

This is my 1st auto D.S.G car so i know nothing about them ive always had manuals.
But wanted a change.
An ive already spent just shy of £2000 replacing flywheel clutch pack gearbox oil an filter
Maf sensor
Remap and mot 2days ago.

Is there somthing silly that ive missed.

Its a 2008
2.0tdi
Dsg with flappy paddles
Audi a3 S-Line sportback 170bhp but mapped to 205bhp
Engine code is BMN
gearbox code is KMW

Any help would be appreciated
Thanks.