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Thread: 2008 VW Jetta 1.4 TSI engine start idle RPM variations

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    Question 2008 VW Jetta 1.4 TSI engine start idle RPM variations

    Hello,
    My 2008 2008 VW Jetta 1.4 TSI 122HP has some issues when started after a couple of days not used.
    Upon ignition it goes to 1400 RPM and then starts its very unstable descent towards 700 RPM where it becomes stable. The 10-15 seconds in-between are hectic, the revs go up and down and the car shakes. Even after stabilizing, sometimes it feels like the engine doesn't run very "round" (if you carefully listen to it, it feels somewhat like a missfire).
    This doesn't happen every time. From what I could observe it almost doesn't happen during cold weather. when it is hot outside, it happens more when the tank is less tan half full.
    The spark plugs have been changed and the throttle body cleaned (not very dirty anyway).
    On the tester there are some errors, but nothing related to engine management (see report below).
    Does anyone have an idea what is causing this?
    Thank you in advance!

    Code:
    Wednesday,05,June,2019,20:37:17:50604
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.0.2 (x64)  HEX-NET CB: 0.4505.4
    Data version: 20190529 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WVWZZZ1KZ8M174332   License Plate: 
    Mileage: 125990km-78286mi   Repair Order: 
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 1K (1K0)
    Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56 62 72
    
    VIN: WVWZZZ1KZ8M174332   Mileage: 125990km-78286miles
    
    01-Engine -- Status: OK 0000
    03-ABS Brakes -- Status: OK 0000
    04-Steering Angle -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    16-Steering wheel -- Status: Malfunction 0010
    17-Instruments -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    25-Immobilizer -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    52-Door Elect, Pass. -- Status: Malfunction 0010
    56-Radio -- Status: OK 0000
    62-Door, Rear Left -- Status: OK 0000
    72-Door, Rear Right -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (CAX)       Labels: 03C-906-022-CAX.clb
       Part No SW: 03C 906 022 J    HW: 03C 906 022 J
       Component: MED17.5.20      G   8644  
       Revision: D5H03---    Serial number: VWX7Z0H4243045
       Coding: 0000072
       Shop #: WSC 10102 599 84138
       VCID: A3066DE76210D4572C-80F6
    
    No fault code found.
    Readiness: 0000 0000
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 1K0-907-379-MK70.lbl
       Part No: 1K0 907 379 P
       Component: ASR FRONT MK70      0105  
       Coding: 0017025
       Shop #: WSC 00066 000 00000
       VCID: BFCEC197EEB890B728-80EA
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 1K0-907-044.lbl
       Part No SW: 1K0 907 044 DA    HW: 1K0 907 044 DA
       Component: ClimatronicPQ35 130 1213  
       Revision: 00130023    Serial number: 00000000000000
       Shop #: WSC 00000 000 00000
       VCID: E99A3FCFC0BCCE07A6-80BC
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels:. 3C0-937-049-30-H.lbl
       Part No SW: 3C0 937 049 AJ    HW: 3C0 937 049 AJ
       Component: Bordnetz-SG     H54 2202  
       Revision: 00H54000    Serial number: 00000000952804
       Coding: 81078E0700041500470A00000F00000000095D035C00010C000000000000
       Shop #: WSC 00066 123 12345
       VCID: F1AA57AFE86C36C7EE-80A4
    
       Subsystem 1 - Part No: 1K1 955 119 E  Labels: 1KX-955-119.CLB
       Component: Wischer 300408 021  0501  
       Coding: 00038805
       Shop #: WSC 00066  
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 1K0-909-605.lbl
       Part No SW: 1K0 909 605 T    HW: 1K0 909 605 T
       Component: 2J AIRBAG VW8   020 2300  
       Revision: 05020000    Serial number: 0038PD1W1GN-  
       Coding: 0012874
       Shop #: WSC 00066 000 00000
       VCID: BD32BB9FE4B482A73A-80E8
    
       Subsystem 1 - Serial number: 6332MSME3672732DE
    
       Subsystem 2 - Serial number: 6342MSME32521415 
    
       Subsystem 3 - Serial number: 6351HSME141C4D47D
    
       Subsystem 4 - Serial number: 6361HSME141C24620
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
       Part No SW: 1K0 953 549 BG    HW: 1K0 953 549 BG
       Component: J0527           051 0100  
       Coding: 0002021
       Shop #: WSC 00066 000 00000
       VCID: F8BC6A8B8B16678F29-80AC
    
       Subsystem 1 - Part No: XXXXXXXXXXX 
       Component: E0221           002 0010
    
    5 Faults Found:
    00576 - Terminal 15 
                012 - Electrical Fault in Circuit
    00883 - Ignition Switch (D) Terminal S 
                012 - Electrical Fault in Circuit
    00884 - Ignition Switch (D) Terminal X 
                012 - Electrical Fault in Circuit
    01744 - Ignition Switch Terminal P (D) 
                012 - Electrical Fault in Circuit
    00885 - Ignition Switch (D) Terminal 50 
                012 - Electrical Fault in Circuit - Intermittent
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
       Part No SW: 1K0 920 874 A    HW: 1K0 920 874 A
       Component: KOMBIINSTRUMENT 3HL 2216  
       Revision: V0002000    Serial number: VWX7Z0H4243045
       Coding: 0023103
       Shop #: WSC 10102 599 176587
       VCID: AB1685C70AC01C1794-80FE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway        Labels:. 1K0-907-530-V3.clb
       Part No SW: 1K0 907 530 L    HW: 1K0 907 951 
       Component: J533  Gateway   H07 0052  
       Revision:   H07 01    Serial number: 260308F2013695
       Coding: E9807F060002021002
       Shop #: WSC 00066 000 00000
       VCID: B02C92AB23E67FCFA1-80E4
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
       Part No SW: 1K0 920 874 A    HW: 1K0 920 874 A
       Component: IMMO            3HL 2216  
       Revision: V0002000    Serial number: VWX7Z0H4243045
       Shop #: WSC 00000 000 00000
       VCID: AB1685C70AC01C1794-80FE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver        Labels:. 1K0-959-701-MIN3.clb
       Part No SW: 1K0 959 701 P    HW: 1K0 959 793 L
       Component: J386  TUER-SG FT    1133  
       Revision: 32008001    Serial number: 00000260088418
       Coding: 0000180
       Shop #: WSC 00066 000 00000
       VCID: BB36B587FAA08C9704-80EE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 1Kx-909-144-G2V3.clb
       Part No: 1K1 909 144 M
       Component: EPS_ZFLS Kl.069 H08 1901  
       Shop #: WSC 00066 000 00000
       VCID: B522A3BFDC845AE7F2-80E0
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels:. 1K0-959-433-MAX.clb
       Part No SW: 1K0 959 433 BT    HW: 1K0 959 433 BT
       Component:    KSG PQ35 G2  020 0204  
       Revision: 00020000    Serial number: 00000000000000
       Coding: 98900A0001060C7F2D048C0D70084FC6F0FC00
       Shop #: WSC 00066 123 12345
       VCID: 83460D67C2D034570C-80D6
    
       Subsystem 1 - Part No: 1K0 951 605 C
       Component: LIN BACKUP HORN H03 1301
    
       Subsystem 2 - Part No: 1K0 951 178 A
       Component: Neigungssensor  003 0203
    
       Subsystem 3 - Part No: 1K0 951 178 A
       Component: Innenraumueberw.003 0203
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
       Part No SW: 1K0 959 702 P    HW: 1K0 959 792 L
       Component: J387  TUER-SG BT    1133  
       Revision: 32008001    Serial number: 00000078588412
       Coding: 0000180
       Shop #: WSC 00066 000 00000
       VCID: BC34B69BFFAE8BAF0D-80E8
    
    1 Fault Found:
    00097 - Front Passengers Central Locking (Safe) Motor (V162) 
                012 - Electrical Fault in Circuit
                 Freeze Frame:
                        Fault Status: 01101100
                        Fault Priority: 3
                        Fault Frequency: 2
                        Reset counter: 223
                        Mileage: 125980 km
                        Time Indication: 0
    
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 1K0-035-1xx-56.lbl
       Part No: 1K0 035 186 AD
       Component: Radio GR0       034 0033  
       Revision: 0003404S    Serial number: VWZ2Z2H6540654
       Coding: 0040400
       Shop #: WSC 00066 000 00000
       VCID: E89C3ACBDBB6F70FB9-80BC
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 62: Door, Rear Left        Labels:. 1K0-959-703-GEN3.clb
       Part No SW: 1K0 959 703 P    HW: 1K0 959 795 G
       Component: J388   TUER-SG HL   1120  
       Revision: 11006001    Serial number: 00000003011286
       Coding: 0000144
       Shop #: WSC 00066 000 00000
       VCID: BD32BB9FE4B482A73A-80E8
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 72: Door, Rear Right        Labels:. 1K0-959-704-GEN3.clb
       Part No SW: 1K0 959 704 P    HW: 1K0 959 794 G
       Component: J389   TUER-SG HR   1120  
       Revision: 11006001    Serial number: 00000003006863
       Coding: 0000144
       Shop #: WSC 00066 000 00000
       VCID: BE30BC93E9B299BF23-80EA
    
    No fault code found.
    
    End----(Elapsed Time: 01:26, VBatt start/end: 11.9V/11.9V. VIgn 11.9V)-----
    Last edited by Uwe; 06-05-2019 at 03:40 PM. Reason: CODE tags

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