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Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration - Fixed #

Posted by Pere Roca on October 3, 2015, 7:25 pm

Year of Manufacture *: 2005
Engine Size and Code *: 2.0 TDi - BKD - pump injectors
( Optional ) ECU Type: EDC16U1
( Optional ) Scanner Used: vcds
( Optional) Fault Codes: no fault codes

This Skoda is hardly misfiring RANDOMLY under acceleration. I've tested intank fuel pressure, its ok at 0.5 bar when fault occurs. Turbo pressure ok at 2200 mbar when fault occurs.
What do you think about fuel injectors harness inside the head?. Could this be the culprit? Because I've changed several harness in the past to other VAG cars, but always fault codes about injectors are stored!. This one there's no codes!
Any help will be great! Regards!

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by Peter Mashiter <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3935' width='330' height='300' border=0 style='border:none;'> on October 10, 2015, 6:03 pm, in reply to "Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"

Check the fuel filter element.

If it looks black then wipe your finger on it & black residue appears on your finger then it is engine oil.

Where might you ask does that come from!!??!!

One of 2 areas.

1) The Bi vacuum / diesel pressure vane pump gasket or pump internals. (Always check this first)

or

2) Internal cylinder head failure. This engine uses internal fuel delivery galleries within the cylinder head to supply the injectors. The injectors are a Pumpe Duze type that uses a cam lobe to create high injection pressures. This design suffers from injector rock from the cam causing the cylinder head fuel galleries to fracture & leak engine oil into the fuel & vice versa within the cylinder head. In this case a new cylinder head will be required

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by mark mcgrath <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2806' width='330' height='300' border=0 style='border:none;'> on October 12, 2015, 4:57 am, in reply to "Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"
Mark McGrath

just type vag bkd engine faults on google and you will find a vereee long list of possible faults
has fuel filter been changed are pipes on the right way ?

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by Peter Mutlow <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on October 12, 2015, 5:05 am, in reply to "Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"

Hi Pere,

Has it had a remap? A poor remap can cause this. Seen it before. No fault codes were recorded.

Regards

Pete M

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by Pere Roca <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5555' width='330' height='300' border=0 style='border:none;'> on November 5, 2015, 7:19 am, in reply to "Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"

No remap on this engine. Thanks!

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by Pere Roca <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5555' width='330' height='300' border=0 style='border:none;'> on November 5, 2015, 7:42 am, in reply to "Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"

Just an update to fault.
I changed the injector harness and fault reoccurs randomly. Tomorrow I will check if there's oil in fuel filter. Thanks for replys !

Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #

Posted by Chris Angus <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat5111' width='330' height='300' border=0 style='border:none;'> on November 5, 2015, 11:01 am, in reply to "Re: Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"

Have a look at measuring block 23 when you drive and it jerks.
From memory they should be about 25.

values over 90 on all four is indication of fuel supply issues.

If only individual values over 90 is indication of leaking tapered support in head.

You also need to check the fuel pressure at the tandem pump too, it has a test port. maybe a good idea to test this when fault occurs too.

Fixed #

Posted by Pere Roca on February 1, 2016, 8:37 pm, in reply to "Skoda Octavia 2.0 TDi BKD 2005 - Engine jerks at acceleration #"
Edited by board administrator February 2, 2016, 1:03 pm

I got a scond hand ECU from scrapy yard, delete immo and try, but fault is still there.
I solder a wire from ECU to common electronic ground of pump-injectors and it's been a month with no faults now. I upload a wiring diagram, green trace is wire added by me. Thanks!

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