Golf Mk V 2L Tdi BKD engine misfire at idle

If you are not a PicoScope user and want advice with a diagnostic problem then post here. Forum members may be able to help.

Golf Mk V 2L Tdi BKD engine misfire at idle

Postby RATECH » Tue Dec 27, 2016 2:17 am

Regards my 2008 2.0L Tdi Mk V Golf with the 140bhp engine code BKD, it has a misfire at idle. This little misfire only seems to occur when the car is at idle, always when the car is up to operating temp but also can happen from cold too.

I believe a jumpy idle is common to this engine from what I've read online with various suggestions offered but no one fix that seems to apply to all cars as a solution. I gave the car a full service including fuel filter, air, oil + oil filter, etc... This didn't really make any difference to the idle misfire. I'll also point out that the rev counter doesn't fluctuate during the misfire, it sits steady and you just feel a little judder within the car.

Some suggestions I've come across:
- Software update from dealers apparently fixed some cars
- Flywheel. (I doubt this is the problem)
- Injectors
- Cam timing (I believe its hard to set the timing exactly on this BKD engine)

I'm unsure how to proceed with trying to cure this issue, I'd appreciate it if some of ye folks could point me in the right direction to go from here. I can post up fault codes from VCDS if needed of which there was 1 relating to the Cam shaft sensor.
RATECH
Newbie
 
Posts: 2
Joined: Tue Dec 27, 2016 2:02 am

Re: Golf Mk V 2L Tdi BKD engine misfire at idle

Postby STC » Tue Dec 27, 2016 5:12 pm

I can post up fault codes from VCDS if needed of which there was 1 relating to the Cam shaft sensor.


Yes, please post the fault codes.
Also from VCDS Measured Values it would be good to see Injector Corrections, Torsion Value, Misfire Counters whilst it is misfiring.

- Software update from dealers apparently fixed some car
- - - Not so sure about that, I'm guessing that car is now 8-10 years old ?

- Flywheel. (I doubt this is the problem)
- - - A DMF can cause Crank / Cam faults so keep an open mind and don't dismiss that. Also a persistent misfire does have the potential to ruin a DMF.

- Injectors
- - - indeed Yes but first we need to establish if we have a single, multiple or random cylinder misfire ?? Do we have complete or partial misfire(s) ?

- Cam timing (I believe its hard to set the timing exactly on this BKD engine)
- - - Regardless of difficulty it must be Exact, Period !!! One reason I asked for torsion value above.

I note from your "Greetings" post that this a hobby and a DIY interest for you, that may well reflect on the equipment you have available to you for testing ??

Do you have access to an Oscilloscope ? Compression Tester ?
User avatar
STC
Banned
 
Posts: 790
Joined: Sun Sep 13, 2015 4:10 am

Re: Golf Mk V 2L Tdi BKD engine misfire at idle

Postby grunf1976 » Thu Dec 29, 2016 6:21 pm

Hi,
That is common for all 2.0 tdi engines and it is usually more noticeable when the engine is at operating temperature.
I found that two things can cause that. First is injector seat inside the cylinder head. Over time it wears and blow by gases deteriorate radial tip of the injector and it is not seating flush with the head. As a result fuel drips into the cylinder and it causes engine shudder at idle (over fueling). Second thing would be hydraulic lifters. They go bad and for some reason they act totally opposite than regular lifters.
Hope this helps,
Mickey
grunf1976
OneWave
OneWave
 
Posts: 33
Joined: Tue Dec 15, 2015 5:05 pm
Location: Belgrade, Serbia

Re: Golf Mk V 2L Tdi BKD engine misfire at idle

Postby KarolMotronic » Tue Feb 28, 2017 10:34 pm

Engine pillow may be defective and therefore may be those vibrations but these are my suggestions I had a similar problem where fluid leakage from the cushion and were engine vibration at idle.
But this is only my suggestion in this topic
Replacing the only original part

Regards Karol
KarolMotronic
Newbie
 
Posts: 8
Joined: Wed Feb 08, 2017 7:14 pm
Location: Poland

Re: Golf Mk V 2L Tdi BKD engine misfire at idle

Postby STC » Wed Mar 01, 2017 2:16 am

Hi Karol

Engine pillow may be defective


Pillow may or may not make any sense to non Polish Speakers. However I have a very Basic understanding of the language.

By "Pillow" I guess you refer to "poduszka" - Prawda ?

We would call that the Engine "Mounting"
User avatar
STC
Banned
 
Posts: 790
Joined: Sun Sep 13, 2015 4:10 am


Return to Help me fix my car

Who is online

Users browsing this forum: No registered users and 0 guests