Revs dropping, car juddering - MK4 Golf 1.6

JustAnotherSaver

For the record this is the readout from vagcom....

VCDS Version: Release 15.7.4 (x64) Running on Windows 7 x64
Data version: 20160216
https://www.Ross-Tech.com

Sunday,30,October,2016,14:23:10:47709

Chassis Type: 1J - VW Golf/Bora IV (1998 > 2006)
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

Mileage: 128890km-80088miles

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Address 01: Engine Labels: Redir Fail!
Part No: 036 906 034 BH
Component: MARELLI 4MV 3773
Coding: 00031
Shop #: WSC 00684
VCID: 59B9E87FC3A32FF659-4B4E

1 Fault Found:
17563 - Manifold Pressure Sensor (G71)
P1155 - 35-10 - Short to Plus - Intermittent
Readiness: 0000 0000

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Address 03: ABS Brakes Labels: 1C0-907-37x-ABS.lbl
Part No: 1C0 907 379 C
Component: ABS FRONT MK60 0103
Coding: 0001025
Shop #: WSC 00028 615 1234567
VCID: 2A5B67B38645746E00-5140

No fault code found.

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Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 6Q0 909 605 A
Component: 0F AIRBAG VW5 01 0004
Coding: 12358
Shop #: WSC 00028
VCID: 356144CF0FFB2B969D-4B02

No fault code found.

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Address 17: Instruments Labels: 1J0-920-xx5-17.lbl
Part No: 1J0 920 925 A
Component: A4-KOMBIINSTR. VDO V09
Coding: 01403
Shop #: WSC 52580
VCID: 275D9E87C55749061F-515E

Subsystem 1 - Part No: IMMO
Component: IDENTNR: VWZ7Z0Y2803572
IMMO-IDENTNR: VWZ7Z0Y2803572

No fault code found.

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Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 00028
VCID: 70EFB5DB30194EBE8E-515E

No fault code found.

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Address 46: Central Conv. Labels: 1J0-959-799.lbl
Part No: 1J0 959 799 AH
Component: 4U Zentral-SG Komf. 0001
Coding: 04096
Shop #: WSC 00684
VCID: 0407E90B14A1421E5A-4B1C

Subsystem 1 - Part No: 1J2959802C
Component: 4U Tõrsteuerger. FS0002r

Subsystem 2 - Part No: 1J2959801D
Component: 4U Tõrsteuerger. BF0002r

Subsystem 3 - Part No: 1J4959811C
Component: 4U Tõrsteuerger. HL0002r

Subsystem 4 - Part No: 1J4959812C
Component: 4U Tõrsteuerger. HR0002H

2 Faults Found:
00953 - Interior Light Time limit
25-10 - Unknown Switch Condition - Intermittent
00943 - Heated Exterior Mirror; Driver Side (Z4)
35-00 - -

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Address 56: Radio Labels: 1J0-035-18x-56.lbl
Part No: 1J0 035 186 E
Component: Radio BNO 0005
Coding: 01403
Shop #: WSC 00028
VCID: 275D9E87C55749061F-4B02

1 Fault Found:
00853 - Loudspeaker(s); Rear
36-10 - Open Circuit - Intermittent

End

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(Elapsed Time: 05:01)

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facade

1 Fault Found:
17563 - Manifold Pressure Sensor (G71)
P1155 - 35-10 - Short to Plus - Intermittent
Readiness: 0000 0000

You have a MAP (manifold absolute pressure) sensor not MAF (mass airflow), looks as though BeenThroughItAll is right. It will be a small cube on top of the inlet manifold, or connected to it via a rubber pipe.

atrixblue.-MFR-.

facade wrote: »

If the rev counter drops, assuming it didn't immediately slow to 30, then there is something wrong with the signal informing the ecu of the engine rotation- so crankshaft sensor..

These rarely if ever put the warning light on.

:rotfl: have you ever been in mk4 golf, I can tell you if it doesn't like the way its being treated itll tell you with a warning light and fault code. Crank sensor IS governed by the ECU it actually has very tightly set parameters within the ECU's coding to throw a code, so if its not a happy chappy it will tell you with the EML.


Crank sensor is the No.1 bug bear of Pug 206 and 307 owners to as it throws the ECU into a hissy fit when it starts to go faulty and the car cries "anti pollution fault" in petrol models.


I find crank sensors in MK4 golfs not to be problematic as MAF and MAP sensors to go along with the faulty Fly By Wire stepper motor throttles.

facade

atrixblue.-MFR-. wrote: »

:rotfl: have you ever been in mk4 golf, I can tell you if it doesn't like the way its being treated itll tell you with a warning light and fault code. Crank sensor IS governed by the ECU it actually has very tightly set parameters within the ECU's coding to throw a code, so if its not a happy chappy it will tell you with the EML.

Have to say I've not knowingly been in one (wouldn't know a MK4 from a MK2,3,5,6,7 tbh, but I know what a mk1 looks like):D

The vauxhalls I've had have eaten crank sensors like elephants eat sticky buns, and they don't set the eml, neither does the Suzuki.

JustAnotherSaver

Was talking to my brother about this.

A mate of his had a MK4 1.6. Now whether it's the same engine coding, since VW love to create 101 engines for the same capacity engine, i don't know, but he needed a new crank sensor he was telling me & he's known of other people with MK4s needing new crank sensors too, sounds like something of a common problem.


But anyway, so we should be looking at a new MAP sensor (that's maP not maF? - just for clarification)?

JustAnotherSaver

Oh & does anyone here know how to pick up a genuine sensor for this engine? (I remember it has a Z in the 3 letter coding).

I know i could go to Volkswagen direct & pay about £emptyyourbankaccount but if there's such a website that sells proper genuine sensors then i could buy from there.

From previous experience i'd rather not buy a 'like genuine' sensor. Didn't work out in the past & don't fancy making the same mistake again.

atrixblue.-MFR-.

If memory serves Bosch are the OEM suppliers of sensors to VAG group.

JustAnotherSaver

Just getting round to getting this booked in.

So based on what was said here are you saying it needs a MAP sensor or a Crank sensor, or are they one & the same?

MAP sensor: http://www.ebay.co.uk/itm/Bosch-Map-Sensor-0281002399-/301750654541?fits=Model%3AGolf%7CPlat_Gen%3AMK+IV&hash=item4641bd964d:g:5-kAAOSwWnFWBX8V

Crank sensor: http://www.ebay.co.uk/itm/VW-Golf-MK4-Bora-1J2-Bosch-Engine-Crankshaft-Speed-Sensor-Car-Replacement-Part-/301309687884?fits=Model%3AGolf%7CPlat_Gen%3AMK+IV&hash=item462774f84c:g:oU4AAOSwxH1UECGk Since this keeps putting in a smiley face thing the item number is 301309687884

My wife has said that the car is still doing it on & off, sometimes quite bad sometimes not so bad so better to get the sensor replaced. Just want to do the right one.

Thanks

Strider590

I don't believe a word of this, it's well known that VW Golf is the most reliable car, you only need look at how infrequently they get mentioned on these foru........... Never mind

reeac

My only experience with a crank sensor fault was difficult cold starting. Turned out to be a build up of dirt, probably from the road as it was a N/S engine, which was probably masking the magnetic signal, in combination with the lowered battery voltage during a cold start. Hot starts were not affected.
On another car I had occasional complete loss of power and after a hairy incident at night time in the RH lane of the M25 I had a good look and found that the cables feeding the air mass meter on the fuel injection were stretched a bit tight. Pulling in a bit of slack from elsewhere in the harness cured that one.