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Forum: V8 Engine Tech

Technical discussion on all aspects of VAG 4.2 and 5.2 V8 tuning and tech. Sponsored by JH Motorsports.

JH Motorsports

  1. Optimum Mileage Interval for Spark plug changes on V8 B6/B7, 55K mi seems too long.

    Started by WileyBrill, 11-30-2012 02:27 PM
    • Replies: 7
    • Views: 6,912
    WileyBrill
    12-26-2024, 02:47 PM Go to last post

  2. Flapper delete

    Started by Bhannah510, 09-16-2024 07:36 PM
    • Replies: 0
    • Views: 1,423
    Bhannah510
    09-16-2024, 07:36 PM Go to last post

  3. So Many JHM Supercharged Vehicles for Sale

    Started by wahpao, 02-24-2017 09:39 AM
    • Replies: 7
    • Views: 8,043
    RunninReds
    08-14-2024, 04:34 PM Go to last post

  4. Looking for good tutorial on removing the intake manifold on a B7 S4.

    Started by oleosanxez, 06-03-2024 12:31 AM
    intake manifold, manifold spacers
    • Replies: 0
    • Views: 1,414
    oleosanxez
    06-03-2024, 12:31 AM Go to last post

  5. Throttle Body Not Calibrating-S4 B7

    Started by Mar'd, 03-31-2023 11:37 AM
    • Replies: 2
    • Views: 2,332
    Mar'd
    05-14-2024, 08:33 AM Go to last post

  6. RS4 B8 Random Cold Start Issue (P000D/A - P0175/P0172 [232])

    Started by Totender7, 05-02-2024 09:45 AM
    • Replies: 0
    • Views: 880
    Totender7
    05-02-2024, 09:45 AM Go to last post

  7. C7.5 S7 Suspension not adjust in different drive modes

    Started by SirBreezy, 04-22-2024 11:01 PM
    • Replies: 0
    • Views: 922
    SirBreezy
    04-22-2024, 11:01 PM Go to last post

  8. 4.2 FSI (BAR) Oil leak

    Started by mithril, 02-06-2024 08:51 PM
    1 Attachment(s)
    • Replies: 0
    • Views: 812
    mithril
    02-06-2024, 08:51 PM Go to last post

  9. Resets of Oil Life program after oil changes - not working - Why?

    Started by WileyBrill, 01-25-2024 07:48 AM
    • Replies: 0
    • Views: 775
    WileyBrill
    01-25-2024, 07:48 AM Go to last post

  10. Need help with cylinder head bvj vs bar

    Started by Fattyneff, 01-07-2024 10:44 AM
    q7 4.2 bar bvj
    • Replies: 0
    • Views: 1,084
    Fattyneff
    01-07-2024, 10:44 AM Go to last post

  11. Exclamation Rs4 throttle body faults g69/g188 limp mode help!!

    Started by 1FastS4.Com, 04-28-2017 06:12 PM
    • Replies: 2
    • Views: 3,930
    audirari
    12-28-2023, 11:35 PM Go to last post

  12. New 4.2fsi long block from Audi

    Started by Mugelloblu42, 02-06-2023 10:29 AM
    • Replies: 1
    • Views: 2,570
    Bordom
    10-23-2023, 08:59 AM Go to last post

  13. Audi s5 b8 09 v8

    Started by Shabayaba, 09-26-2023 07:51 AM
    audi s5 b8 v8
    • Replies: 0
    • Views: 761
    Shabayaba
    09-26-2023, 07:51 AM Go to last post

  14. Camshafts rotating after removing locking tools

    Started by bferrell130, 04-21-2023 12:22 PM
    • Replies: 0
    • Views: 1,283
    bferrell130
    04-21-2023, 12:22 PM Go to last post

  15. Needing a Audi / RS4 Mechanic / Tech

    Started by Dzicch, 04-11-2023 05:50 PM
    • Replies: 0
    • Views: 1,093
    Dzicch
    04-11-2023, 05:50 PM Go to last post

  16. Ported JHM head noise--valve guides too short?

    Started by Andrew J, 03-12-2022 11:57 AM
    • Replies: 2
    • Views: 2,366
    DR.Death
    03-26-2023, 06:34 AM Go to last post

  17. ABZ V8 as a stand alone. Which wires do I need?

    Started by DR.Death, 03-25-2023 11:38 PM
    • Replies: 0
    • Views: 1,302
    DR.Death
    03-25-2023, 11:38 PM Go to last post

  18. No Crank no start , b6 s4

    Started by Rcryan7, 03-07-2023 12:20 PM
    1 Attachment(s)
    • Replies: 1
    • Views: 1,256
    oripaamoni
    03-16-2023, 10:22 AM Go to last post

  19. BAD BHF ENGINE REPLACED WITH BNK A6 4.2 ENGINE - NOW GETTING LIMP MODE / CAM CODES

    Started by derek76757, 03-02-2023 02:25 PM
    • Replies: 0
    • Views: 2,317
    derek76757
    03-02-2023, 02:25 PM Go to last post

  20. 2011 S5 4.2 cyl 1 misfire

    Started by Jaymehaze, 09-30-2020 09:35 AM
    1 Attachment(s)
    • Replies: 4
    • Views: 3,631
    philbegas
    11-18-2022, 08:01 AM Go to last post

  21. BNS repair manual??

    Started by Mugelloblu42, 01-24-2022 09:06 PM
    • Replies: 1
    • Views: 2,557
    WEC
    10-24-2022, 02:39 PM Go to last post

  22. What exactly is "active" about the factory active motor mounts (B6 S4)?

    Started by BigBrownDog, 03-28-2015 08:13 PM
    • Replies: 5
    • Views: 16,014
    Zolli
    10-17-2022, 05:38 PM Go to last post

  23. 4.2 intake flapper issue

    Started by B76767, 10-13-2022 09:26 AM
    • Replies: 1
    • Views: 2,145
    Zolli
    10-17-2022, 01:30 PM Go to last post

  24. RS7 exhaust

    Started by JpRS7, 10-10-2022 05:54 AM
    exhaust
    • Replies: 0
    • Views: 1,497
    JpRS7
    10-10-2022, 05:55 AM Go to last post

  25. B6 S4 Tune unknown!

    Started by jamboravr6, 09-05-2022 08:39 PM
    • Replies: 0
    • Views: 1,731
    jamboravr6
    09-05-2022, 08:39 PM Go to last post

  26. Touareg 4.2 AXQ timing belt screw up?

    Started by rickyw59, 06-20-2022 04:24 PM
    • Replies: 1
    • Views: 3,078
    rickyw59
    07-04-2022, 07:52 PM Go to last post

  27. Can't find this vacuum leak...

    Started by motionvega, 04-29-2022 09:42 PM
    • Replies: 0
    • Views: 2,356
    motionvega
    04-29-2022, 09:42 PM Go to last post

  28. 40V Swap - 987.1 Cayman SCHOOL ME HERE

    Started by bkwrzdub, 03-30-2022 11:34 AM
    • Replies: 3
    • Views: 6,442
    bkwrzdub
    04-12-2022, 10:14 AM Go to last post

  29. B6 S4; time for timing service?

    Started by Hydr0, 01-16-2022 10:03 AM
    2 Attachment(s)
    • Replies: 0
    • Views: 2,797
    Hydr0
    01-16-2022, 10:03 AM Go to last post

  30. B6 B7 Throttle body measurements needed!

    Started by Cgaines98, 12-10-2021 06:25 PM
    • Replies: 0
    • Views: 2,265
    Cgaines98
    12-10-2021, 06:25 PM Go to last post

  31. Misfire bank 1

    Started by Slicknick97, 10-21-2021 02:24 PM
    • Replies: 1
    • Views: 2,558
    Rol-co
    11-30-2021, 08:15 AM Go to last post

  32. Audi S5 V8 4.2l (CAUA): fuel return line

    Started by Silv3r, 01-06-2019 11:50 AM
    • Replies: 5
    • Views: 15,151
    dymx
    10-12-2021, 11:12 AM Go to last post

  33. What plug/sensor is this??

    Started by NickDee, 08-27-2021 08:50 AM
    • Replies: 0
    • Views: 2,323
    NickDee
    08-27-2021, 08:50 AM Go to last post

  34. 2005 Audi S4 P0345 Camshaft Position Sensor

    Started by B7818, 06-29-2021 11:12 AM
    1 Attachment(s)
    • Replies: 0
    • Views: 3,242
    B7818
    06-29-2021, 11:12 AM Go to last post

  35. Question 4.2L O2 Sensor Codes. Easy fix?

    Started by Squenz, 05-08-2021 09:47 AM
    p2006, p2007, p2198
    • Replies: 0
    • Views: 2,691
    Squenz
    05-08-2021, 09:47 AM Go to last post

  36. Oil in spark plug wells

    Started by VdubB6, 04-29-2021 06:42 PM
    • Replies: 0
    • Views: 2,614
    VdubB6
    04-29-2021, 06:42 PM Go to last post

  37. Piston to wall clearance?

    Started by Nogi B6 S4, 12-15-2020 10:57 PM
    • Replies: 1
    • Views: 4,491
    q_dubz
    03-24-2021, 06:29 AM Go to last post

  38. Engine sounds like misfire at 58-60 mph

    Started by kmacks27, 12-02-2019 12:48 PM
    • Replies: 1
    • Views: 3,347
    Natebowen3
    03-09-2021, 08:48 AM Go to last post

  39. Angry P0355 AUDI - Ignition Coil 5 Primary/Secondary Circuit

    Started by Natebowen3, 03-05-2021 10:18 AM
    • Replies: 0
    • Views: 3,291
    Natebowen3
    03-05-2021, 10:18 AM Go to last post

  40. Talking 2007 A6 4.2 Strange Mis-fire: Codes included in post and YouTube video! Scrap it?

    Started by sgfreak96, 12-10-2020 07:20 PM
    cel, codes, coils, misfire 3 Attachment(s)
    • Replies: 13
    • Views: 5,566
    Fisher1
    02-08-2021, 12:43 AM Go to last post

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