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    VWVortex


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    Thread: Looking to pick a few minds (MKIV 1.8t Diagnostics info needed)

    1. Member
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      2001 VW Jetta 1.8T
      08-20-2012 10:07 PM #26
      No good just tried to pick it up and epc light came on as i turned out. So i just pulled back in and parked it i wasnt limping it home tonight. ill call them in the am and see whats next hope to have it at the dealership or eurowise by the weeks end

      sent from a payphone using quarters

    2. Junior Member
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      2001 VR6 GLX, 91 Jetta GL, 01 Jetta Wolfs 1.8t, 05 Audi A4
      08-20-2012 11:01 PM #27
      Hi, I just read that you keep having the same codes. First I don't think that a P1131 SAE code even exists for this set-up. Second codes P1297 and P1545 is more of the same that I mentioned before. P1297 is an turbo exhaust side vac issue. And the P1545, your throttle body doesn't know what it's doing or where it is. First check all the turbo system pipes/hoses/sensors for leaks. Second determine why the throttle body can't find itself. It can be that the sensor or wires are messed up. Have someone that knows about VW/ European cars look at it if you can't figure it out. If there is a Camaro parked at the repair shop, I would look somewhere else. And lastly when you do get the car running perfectly, do not mess with the MAF sensor or throttle body. These sensors are super sensitive and even cleaning them can destroy their functionality.

    3. Member
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      2001 VW Jetta 1.8T
      08-21-2012 07:08 AM #28
      The shop its at has a parking lot full of Mercedes BMW's and VW
      i really think its a wiring/ electrical issue 2 tb and a pedal have done nothing for the throttle codes lol
      sent from a payphone using quarters

    4. Junior Member
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      2001 VR6 GLX, 91 Jetta GL, 01 Jetta Wolfs 1.8t, 05 Audi A4
      08-21-2012 11:05 AM #29
      Good to hear. The 1.8t is a good engine. Make sure you do the timing belt and water pump as required if it's not been replace already, it's a critical maintenance.

    5. Member
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      2001 VW Jetta 1.8T
      08-21-2012 12:14 PM #30
      Yeah i love the car, and timing was done at 90k its now at 120k

      sent from a payphone using quarters

    6. Member
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      2001 VW Jetta 1.8T
      08-21-2012 06:00 PM #31
      Ok so I called the shop, its ready again they said they replaced the tb this time... when I asked what they did yesterday they said that it had to be re adapted to confirm a faulty tb before warranting it out.
      Sounds legit I suppose. So tonight I will try again hopefully I will get many epc free miles out of it. Record as of now is 937 miles w/o epc.

      sent from a payphone using quarters

    7. Member
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      2001 VW Jetta 1.8T
      08-21-2012 09:46 PM #32
      Picked it up all seems well so far I think lol I suspect the LTFT to be learning new parameters bc coming to a stop drops the idle quite a bit and it became less apparent as i drove home got a vid i may try to upload later.

      sent from a payphone using quarters

    8. Member
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      2001 VW Jetta 1.8T
      08-22-2012 09:15 PM #33
      I retract my previous post... epc light came on i was driving with AC on up a small hill vac was at 12 or so when i felt it, a small jerk vac gauge zeroed out and returned to 17 and epc came on
      Bahh
      Pulled over let it clear and it was back in less than 2 miles.

      sent from a payphone using quarters

    9. Junior Member
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      2001 VR6 GLX, 91 Jetta GL, 01 Jetta Wolfs 1.8t, 05 Audi A4
      08-23-2012 11:25 PM #34
      AHhhhhh, Dude, you have to pull some codes off of this ECM and see why it's giving you the EPC...... Best of all you will know why better then the shop as to why the EPC light comes on...... Change to the stock "WORKING" DV valve, none plastic. And work backwards from there.... Better yet check to see if you're o2 sensors are giving the correct fuel adjustment curves to the ECM.... Also, if you do any serious performance mods to the fuel/air/evap system without deleting the stock programing, expect to live with CEL/EPC lights .... Lastly, you can see yourself where the vac leak is..... Have you changed the entire PCV system housing thing that sits somewhere on top of the engine?? could be the problem that simple... Have you checked all turbo hoses for leaks???? I bet the shop wasn't looking for those... Spray some start fluid in key areas and see if it makes a differance in idle,, (engine cold). Hope this helps in your effort... and good to see the timing is done
      AJ

      If all else fails, Hanz at VW knows the answer...Don't offend him...

    10. Junior Member
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      2001 VR6 GLX, 91 Jetta GL, 01 Jetta Wolfs 1.8t, 05 Audi A4
      08-23-2012 11:51 PM #35
      Also check around for info about the EPC light.....And make sure you have the updated revised and newly revised coil packs for the 1.8 AWD.


      Later
      AJ

    11. Member
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      2001 VW Jetta 1.8T
      08-26-2012 08:40 AM #36
      Thanks guys im sure its something extremely simple at this point. Im just gonna hold out till monday and take it to vw. Taking my car places kinda makes me feel lame but i have zero time to even wash it at this point and ima see what they can do on a stage 1+ if everything checks out

      I will update and let u all know what it actually was so we can all laugh while i face palm the mess outa myself

      sent from a payphone using quarters
      Last edited by stockstatus; 08-28-2012 at 08:38 PM.

    12. Member
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      2001 VW Jetta 1.8T
      08-26-2012 12:31 PM #37
      So today i put the forge dv in full recirculation mode and installed it and drove to the lake. On the way at some point the cel went off.

      sent from a payphone using quarters

    13. Junior Member
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      2001 VR6 GLX, 91 Jetta GL, 01 Jetta Wolfs 1.8t, 05 Audi A4
      08-27-2012 12:34 AM #38
      I see you are making some progress. The stock ECM programing will run your system at an optimum state if all the parameters are in sync. If you throw those numbers off by aggressive mods without adjusting for them, you will get all the warning lights and all limp modes.... I ran my 1.8t with just a standard aftermarket DV, intake, and exhaust. And it was happy for thousands of miles..... If your brave to upgrade, then I say go for it.....IF CEL is the issued go stock......Happy tuning....

    14. Member
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      08-28-2012 08:36 PM #39
      I got a call from the dealer today they said it was tough to chase down but they are confident that the dv was the issue i told them the stock one was in the back if they want to try it and made them aware of the issues being present even with the stock dv. He said they would keep looking. i feel good about these guys hope they get it right for me.



      sent from a payphone using quarters

    15. Member
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      08-29-2012 01:16 PM #40
      Called the dealer today for an update and they said the intake hose was leaking not sure if its the turbo inlet hose or not, counter guy wasnt sure. But part will be on friday. Woohoo

      sent from a payphone using quarters

    16. Member
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      2001 VW Jetta 1.8T
      08-30-2012 09:45 PM #41
      soo apparently the diagnostics level of the last shop is DEE DEE DEE because these guys at VW found a leaking intake hose. I'm assuming the Inlet pipe. They said after i dismissed the DV that they went straight to it. part will be in friday morning and I can pick it up that afternoon. I dont wanna jinx it but im pretty excited to have it running right.

    17. Member Rockerchick's Avatar
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      '03 BMP 20th GTI, '84 TD Jetta
      08-30-2012 10:24 PM #42
      Yeah I wouldn't go to that other shop again.
      Quote Originally Posted by TM87 View Post
      VW-making mechanics out of owners since 1957.
      The project - '84 Jetta 1.6TD
      Hers - '03 BMP 20thAE GTI
      His - '01 Jetta TDI

    18. Member
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      08-31-2012 12:01 PM #43
      Ill be stopping by later next week to do some hefty s**t talkin

      sent from a payphone using quarters

    19. Member
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      08-31-2012 05:50 PM #44
      Dayum.... dealer called today when the tech went to install the part they had ordered the wrong one and the new one won't be here til Wednesday good news is the part was 200 more than they originally said and i am paying for the cheaper part.

      I asked which hose and they said turbo bypass??

      sent from a payphone using quarters

    20. Member
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      2001 VW Jetta 1.8T
      09-05-2012 11:52 PM #45
      Picked up from the dealer tonight and all seems well i will update after i drive a little more

      sent from a payphone using quarters

    21. Member
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      2001 VW Jetta 1.8T
      09-06-2012 01:06 PM #46
      So it ran well all the way to school but the vac gauge still kinda rattles at 20hg at idle and 18hg with idle and ac wonder if my leaky oil fill cap is the culprit of this.

      sent from a payphone using quarters

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