Misfiring and possible injector problem. Tdi 2006 jetta

Discussion in 'Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum' started by pegleg1492, Jul 10, 2012.

  1. pegleg1492

    pegleg1492 New Member

    Joined:
    Jul 10, 2012
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    Car:
    2006 tdi Jetta and 1998 tdi Beetle
    I recently took my tdi 1.9L jetta 2006 with 180k miles, to the dealer b/c it seemed to be running rough and possible misfiring. After running diagnostics they determined they problem was 1) Egr vacuum selanoid valve (stuck open) 2) The waste gate bypass valve 3) The air charge pressure sensor. After they replaced these 3 parts, (over $1000 including labor) the car is doing the same thing, he now says they need to replace the injector pump and all 4 injectors ($4200). Is there any way to confirm that it need these injectors and pump? Does anyone know any good tdi mechanics near albany ny?
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  2. chittychittybangbang

    chittychittybangbang Administrator

    Joined:
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    Car:
    2006 Jetta TDI
    Location:
    CT
    Well, there is no injector pump and the injectors don't fail often.

    IMHO, do a camshaft inspection, see FAQ for DIY. Your welcome.
  3. pegleg1492

    pegleg1492 New Member

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    Car:
    2006 tdi Jetta and 1998 tdi Beetle
    I've inspected the camshaft, and everything is good... I tried the diesel purge (thanks to your you tube video) after 1 can it didn't seem to help, it seems to idle ok but reving the engine there is an ovious misfire happening, and when driving it has little power, like it is running on 3 cylinders.. Do you think I should try running more purge through it?
  4. chittychittybangbang

    chittychittybangbang Administrator

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    Car:
    2006 Jetta TDI
    Location:
    CT
    no, if I were you, I'd invest in VCDS or at least get ebay cable + vcds-lite freeware version to pull the codes yourself. Full version VCDS will give you all the options and menus. Start taking measurements and running some tests or you'll have to pay someone else to do them. Could be injectors like they said but they don't fail often. More common is bad camshaft, bad injector bores, or wiring harness issues.
  5. pegleg1492

    pegleg1492 New Member

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    Car:
    2006 tdi Jetta and 1998 tdi Beetle

    Attached Files:

  6. chittychittybangbang

    chittychittybangbang Administrator

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    Car:
    2006 Jetta TDI
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    You have 3 engine codes: p0299, p0300, and p0407, google them and learn more.

    sounds like crap. Are you sure the cam lobes are all smooth?
  7. pegleg1492

    pegleg1492 New Member

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    Car:
    2006 tdi Jetta and 1998 tdi Beetle
    I had some one check them, I will probably end up pulling the cover and checking myself..
  8. gt50078

    gt50078 New Member

    Joined:
    Feb 28, 2012
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    6
    Car:
    passat 1.9 tdi
    Hi i had the same issue with my passat it turned out to be a hole in one of the hydrolic lifters hope that helps
  9. pegleg1492

    pegleg1492 New Member

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    Car:
    2006 tdi Jetta and 1998 tdi Beetle
    Turns out it is the cam shaft problem... How do dealer shops know so little about there own cars, never will I darken the doors of a dealer shop again! Thanks for all help! The shop I have it at is going to do the timming belt and the cam job for 2500. Does that sounds reasonable?
  10. pegleg1492

    pegleg1492 New Member

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    Car:
    2006 tdi Jetta and 1998 tdi Beetle
    Did you end up having to replace the cam shaft as well?
  11. Syncronaut

    Syncronaut New Member

    Joined:
    Jun 25, 2012
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    Car:
    2002 Golf TDI
    You will likely need to replace the cam and lifters. They kind of go together like bread and butter. When you inspect your cam look closely at the lobes, especially on the exhaust valves (farthest to the left and farthest to the right) and you will likely see the lifters dished if not collapsed. The cam lobes will be sharp if you rub your fingertip up the side of the lobe coming up from the center of the cam. The lobe should have a visible 45 degree chamfer on the edge of the lobe.

    When you get the cam and lifters out of the head, look closely at the valve stem tips if one of the lifters has broken into two pieces. Make sure the valve stems aren't damaged. Good luck!

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