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Thread: 1.4 FSI (BKG) Misfire - Need all help I can get!

  1. #1
    Junior Member Kobb's Avatar
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    Angry 1.4 FSI (BKG) Misfire - Need all help I can get!

    I bought the car with the engine misfiring (had 68k miles on it, and timing chain changed), only at the time I didn't know jack about it, so thought its normal.
    Later on got a bit more knowledgeable and knew what I was dealing with.

    I drive the car for one whole year and 10k miles with the misfire. It runs the same as it ever did. The symptoms did not worsen.

    So I got to work and over the course of 2 years I've been trying to repair it. Its been to multiple garages with every garage stating a different thing wrong with it. Each visit was not under £200 with some work done.
    I also managed to get myself kicked out of a licenced VW garage for telling them what to do. (cause I didn't want them to do the same thing previous garages did which cost me a fortune and didnt fix anything, but they didn't wanna listen.)

    Enough of the History, here are the symptoms and parts I've replaced.


    Symptoms:

    •Misfire - P0300, P0304 (misfires most on #4, number 3 also does but not frequent, #2 rarely every, #1 never)
    •Rough Idling, engine shaking.
    •Juddering under load in First gear (intermittent, more so in hot weather)
    •Tapping/kocking noise from behind the dash, timing chain side. Tapping ranging from 650 to about 1100rpm. Later on inaudable. Doest not always manifest itself.
    •Spark plugs quote black, seems to be running rich,
    •Intake manifold covered in wet gunk.


    Repairs done:

    •Full service (Oil and Oil Filter, Spark Plugs, Air filter, Fuel Filter.)
    •New Coil Packs.
    •New MAP and Air temperature sensor.
    •New Lambda sensor
    •New In Tank fuel pump
    •New HPFP
    •New Alternator
    •New Battery
    •New set of Injectors
    •New throttle body
    •EGR flush
    •Wiring repairs

    Compression Test Values:

    Cyl1 - 175psi
    Cyl2 - 175psi
    Cyl3 - 173psi
    Cyl4 - 175psi


    MOT - Emissions Fail

    Additional codes: O2 sensor bank1. I've cleared the codes, cant remember the number.


    So, a lot if not too much was done, with no effect whatsoever.
    What's the issue here?

    Its not burnt valves if its holding compression.


    Could it be timing chain? I never thought of that one since its been replaced before. How come no Garage ever mentioned timing.. Last thing I'd want is to replace the timing chain only to find out that thats NOT the issue either.

    Any help and opinion regarding this would be immensely appriciated.
    2005 Golf 1.4 FSI (90PS) BKG

  2. #2
    Administrator Keithuk's Avatar
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    That engine code is only fitted to the Golf.

    Manufacturer: VW, Date(s) Used: 10/2003-07/2005, Model: Golf, Engine Code: BKG, 66Kw, 90PS, 1.4 Ltr, 4 Cyls, Remarks: Fuel Stratified Injection (FSI) Bosch Motronic MED 9.5.10

    VAG Error Code: 16684/15137/10203/4051/000768
    EOBD II Error Code: P0300

    Fault Location:
    Random/Multiple Cylinder(s) - Misfire Detected/Upper Limit Exceeded/Implausible Signal

    Possible Cause:
    Malfunction Indicator Lamp (MIL)(K83) active.

    Wiring/Connector(s).
    Air Intake System leaking.
    Fuel Supply faulty.
    Injector(s) faulty.
    Ignition Cable(s) and/or Spark Plug(s) faulty.
    Ignition coil(s) faulty.
    Exhaust Gas Recirculation (EGR) Valve [N18] stuck/open.
    Camshaft Position (Hall) Sensor (G40) faulty.
    Low compression.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Check Misfire Recognition.
    Check Air Intake System.
    Check Fuel Supply.
    Check Injector(s) and Injector Sealing.
    Check Ignition Cable(s) and Spark Plug(s).
    Check Ignition Coil(s).
    Check Exhaust Gas Recirculation (EGR) Valve [N18].
    Check Camshaft Position (Hall) Sensor (G40).
    Check cylinder compressions.

    Special Notes:
    This Diagnostic Trouble Code (DTC) indicates that one or multiple cylinders are misfiring, but the Electronic Control Unit (ECU) fails to identify the cylinder.

    Tech Notes:
    The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem.

    When is the code detected?:
    The control module monitors the crankshaft speed and has detected a misfire condition.

    Description:
    When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor [G28]/Crankshaft Position Sensor [G28] signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.


    VAG Error Code: 16688/10594/4063/000772
    EOBD II Error Code: P0304

    Fault Location:
    Cylinder 4 - Misfire Detected

    Possible Cause:
    Malfunction Indicator Lamp (MIL)(K83) active.
    Lack/loss of power.
    Hard start.
    Engine hesitation.

    Wiring/Connector(s).
    Ignition system.
    Fuel injectors.
    Fuel pressure.
    Running out of fuel.
    EVAP canister purge valve.
    Evaporative emission system.
    Low compression.
    Base engine problems.
    Engine Control Module (ECM) damaged.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Do a compression test.
    Read Measuring Value Blocks (MVB) 15 if misfire changes location.

    Special Notes:
    This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

    Tech Notes:
    The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4. If the problem persist more tests needs to be done to diagnose problem.

    Description:
    When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Engine Speed (RPM) Sensor [G28]/Crankshaft Position Sensor [G28] signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.


    As taken from my new EOBD II Fault Codes Software
    2010 Golf GTD (170) CBBB, 5 Door, Shadow Blue (P6/D5Q), Transmission Code: KXZ, Flat Tyre Indicator, Basic Protection Pack + VCDS.


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  4. #3
    Administrator Crasher's Avatar
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    The first thing I would do after a quick code read to to “peg and plate it” as we say, that is lock the crank at TDC number one and see if the cam locking plate will go in.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (28 September 1868 – 13 April 1956)

  5. #4
    Junior Member Kobb's Avatar
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    And if the locking plate doesn't go in, timing is off?

    I don't see anything else being wrong with the engine since I've replaced almost everything.
    2005 Golf 1.4 FSI (90PS) BKG

  6. #5
    Administrator Crasher's Avatar
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    Yes, if the plate won’t go in, it has jumped

    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (28 September 1868 – 13 April 1956)

  7. #6
    Junior Member Kobb's Avatar
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    Right, so I went off and bought the TDC and T10171A tool.
    Brought the the first cylinder piston to TDC on compression stroke, and the tool fit right in.
    So timing seems to be correct?

    And I've cleaned up all ground contacts. Put a genuine MAP sensor that I had laying around, but nothing.

    Engine still has a rough idle with misfires, only now It doesnt even want to throw any codes. Clean as a daisy. I did drive it for an hour or so.

    I've no idea what to do next.

    Click image for larger version. 

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    PS: Now driver side window let go of the mechanism. Can hear rattling inside door without window moving.
    2005 Golf 1.4 FSI (90PS) BKG

  8. #7
    Junior Member Kobb's Avatar
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    The other day I drove the car and it ran fine, with ocasional misfires.
    Now its back to its old self misfiring as usual. Heres a video of how it sounds from within the cabin.

    http://www.youtube.com/akkfmofhh4k


    Thoughts?
    2005 Golf 1.4 FSI (90PS) BKG

  9. #8
    Junior Member Kobb's Avatar
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    bump, posted a youtube video, hasnt been approved by moderator
    2005 Golf 1.4 FSI (90PS) BKG

  10. #9
    Administrator Crasher's Avatar
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    There is a problem with the video
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (28 September 1868 – 13 April 1956)

  11. #10
    Junior Member Kobb's Avatar
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    Video fixed.
    2005 Golf 1.4 FSI (90PS) BKG

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