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Help With Engine Shake/rough idle

8777 Views 6 Replies 4 Participants Last post by  red99, 
C
Hey all. Im new to these forums so I hope im posting this in the correct spot an have the correct info. Very recently my Girlfriends beetle has started shaking. it shakes at idle and gets worse while accelerating. Spark plugs were just replaced for some quick trouble shooting and the problem still persists.

Borrowed my friends Ross-Tech and i posted the information down below.
Any help pin pointing the problem would be greatly appreciated! If there is some more info that would be of use, please let me know.

Unrelated to the engine shaking but still very confusing to me is some of the codes that are pulled up. when I plug in my cheapie scanner it just comes up with the random misfire code, and shows that 3 cylinders are misfire. I reset the codes after changing the spark plugs and now it appears to show the random misfire and 2 cylinders are misfiring. The part that is confusing me is that her car does NOT have AWD, nor does it have heated mirrors. any help here would also be appreciated but is not my main concern.

VCDS Version: Release 12.12.0
Data version: 20130910

Wednesday,22,January,2014,16:28:05:61142

Chassis Type: 1C - VW New Beetle (1998 > 2010)
Scan: 01 02 03 08 15 17 19 22 25 26 29 35 37 39 46 54 56 65 75

Mileage: 212390km/131973miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 06A-906-032-AVC.lbl
Part No: 06A 906 032 C
Component: 1.8l 5VT NB HS G 3077
Coding: 00001
Shop #: WSC 00066
VCID: 1E39F0B19A5903EE86F-515E

3 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 -
16686 - Cylinder 2
P0302 - 35-00 - Misfire Detected
16688 - Cylinder 4
P0304 - 35-00 - Misfire Detected
Readiness: 0010 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1J0-907-37x-ABS.lbl
Part No: 1J0 907 379 R
Component: ASR 20 IE CAN 0001
Coding: 13204
Shop #: WSC 00066
VCID: 40856EC9406D151ED43-4B1C

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
Part No: 6Q0 909 605 A
Component: 06 AIRBAG VW5 0003
Coding: 12342
Shop #: WSC 00066
VCID: 356B0F1D0FAFA0B6775-4B1C

1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1C0-920-xx0.lbl
Part No: 1C0 920 801 F
Component: KOMBI+WEGFAHRS. M73 V02
Coding: 07302
Shop #: WSC 01511
VCID: 1E39F0B19A5903EE86F-4B1C

Subsystem 1 - Part No: Ident
Component: Nr. Wegfahrs.:VWZ5Z0X6251135
Ident.-Nr. Wegfahrs.:VWZ5Z0X6251135

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN V022
Coding: 00006
Shop #: WSC 00066
VCID: F0E57E09B04D459EE43-4B1C

2 Faults Found:
01324 - Control Module for All Wheel Drive (J492)
49-00 - No Communications
01044 - Control Module Incorrectly Coded
35-00 - -

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1J0-959-799.lbl
Part No: 1J0 959 799 AJ
Component: 5X Zentral-SG Komf. 0001
Coding: 00256
Shop #: WSC 00066
VCID: 860938D1A2C97B2E2EF-4B1C

Subsystem 1 - Part No: 1J2959802C
Component: 5X Tõrsteuerger. FS0002F

Subsystem 2 - Part No: 1J2959801D
Component: 5X Tõrsteuerger. BF0002r

4 Faults Found:
01329 - Convenience System Data Bus in Emergency Mode
35-00 - -
01332 - Door Control Module; Passenger Side (J387)
49-10 - No Communications - Intermittent
00943 - Heated Exterior Mirror; Driver Side (Z4)
35-00 - -
00944 - Heated Exterior Mirror; Passenger Side (Z5)
35-00 - -

-------------------------------------------------------------------------------
Address 54: Rear Spoiler Labels: 1C0-959-733.lbl
Part No: 1C0 959 733 B
Component: Heckspoiler 0002
VCID: 2A512C61D611FF4EEA7-51B6

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1J0-035-18x-56.lbl
Part No: 1C0 035 180 E
Component: RADIO 3CP 0001
Coding: 00401
Shop #: WSC 00066
VCID: 1A31FCA186716FCE7A7-4B1C

1 Fault Found:
00852 - Loudspeaker(s); Front
36-10 - Open Circuit - Intermittent

End ---------------------------------------------------------------------
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tedybear
Shaking and rough idle with a misfire code.


Which Beetle do you have, and what year?

If you have the 2.0 engine with the misfire code? Common fault is the coil pack. This is easy to spot most of the time. Remove the plastic engine cover and start the engine while it's dark outside. Fair chance you might see some arcing around the coil pack. This will happen most often under strain or engine load--or if you have some higher humidity. Humid air makes it easier for the spark to arc out.

If suddenly it's running great on a dryer day? You can use a spray bottle with just water. And point and shoot around the spark plugs, wires, and coil pack. If you spray an area and things get worse? That's where to look.

S-
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C
tedybear said:
Shaking and rough idle with a misfire code.


Which Beetle do you have, and what year?

If you have the 2.0 engine with the misfire code? Common fault is the coil pack. This is easy to spot most of the time. Remove the plastic engine cover and start the engine while it's dark outside. Fair chance you might see some arcing around the coil pack. This will happen most often under strain or engine load--or if you have some higher humidity. Humid air makes it easier for the spark to arc out.

If suddenly it's running great on a dryer day? You can use a spray bottle with just water. And point and shoot around the spark plugs, wires, and coil pack. If you spray an area and things get worse? That's where to look.

S-
Click to expand...

Yes i suppose the vehicle info would help too :p its. 2000 1.8T
Ok I will try and look for issues with the coil packs. Thanks for the tip.
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tedybear
Not sure if the coil pack issue would apply to yours. I think the 1.8t engine has indy coil packs. It's possible the boot may have damage, or something is causing electrical leaks.

A few others have that engine and should be along to chime in.

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Smileybug
Coil packs are issues with the 1.8t. I would check them out for sure.


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C
So today I tried swapping the coil packs to see what would happen. To start it was saying misfire in cylinder 2 and 4.

Swap Coil pack from Cylinder 1 and 2
-Misfire in Cylinder 1 and 2 :confused:
Swap from cylinder 1 and 4
-Misfire in cylinder 3 and 4

Im not sure what to make of this, any ideas?
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R
You should probably just go ahead and replace them all. The misfire codes are based on knock sensor readings so they shouldn't be taken too literally. There is room for error in how the ECU interprets the readings.
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