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    Thread: Cat or turbo

    1. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 07:40 AM #1
      OK I have a 2000 1.8 with a Apr chip intake dv and cat back. I was driving home somewhat hard and started to smell something and was peaking at 10 so I popped the Hood and the Turbo was glowing red. So today it wont go over 10 psi and sluggish. What I'm wondering could it be the cat or Turbo? Appreciate any help thanks

    2. Member Mk2Reverie's Avatar
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      03-08-2012 07:55 AM #2
      Is there exhaust flow out the tail pipe? Are there current fault codes? More input>

    3. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 08:43 AM #3
      Quote Originally Posted by Mk2Reverie View Post
      Is there exhaust flow out the tail pipe? Are there current fault codes? More input>
      There is flow out of the exhaust it seems more quiet than it was no cell have no vag-com to use to pull. The car was stock till 100,000 miles then added chip two weeks ago.

    4. Member Mk2Reverie's Avatar
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      03-08-2012 09:21 AM #4
      How much boost was it running prior to this problem?

    5. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 09:32 AM #5
      I was peaking around 18-17 holding 16-14 I have a 2.5 custom magnaflow cat back no resonator and it seem quiet compare to other 1.8 I've heard but it is original cat on car Idk what caused the problem

    6. Member Mk2Reverie's Avatar
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      03-08-2012 09:47 AM #6
      Sounds like the turbo could be suffering from oil starvation. Check your oil level number one - If the level is good you could still have an issue with delivery to the turbo itself.

    7. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 09:53 AM #7
      I checked oil this morning it was a little low I added more and it didn't change what would you suggest to start to troubleshoot what is causing it? Newer to turbos and learning as I go thanks for your insight

    8. 03-08-2012 10:04 AM #8
      Scan for codes. If you get a bad bank 2 o2 code, it's the cat. If the exhaust is restricted the turbo can't produce more psi. Exh flow = turbo spinning = psi

    9. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 10:21 AM #9
      Quote Originally Posted by cincyTT View Post
      Scan for codes. If you get a bad bank 2 o2 code, it's the cat. If the exhaust is restricted the turbo can't produce more psi. Exh flow = turbo spinning = psi
      Only probably I had o2 delete on my software cause I planned on doing hfc or test pipe later so I guess I gotta do it now and see if that is the problem right?

    10. Member hammeredGLI's Avatar
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      03-08-2012 11:04 AM #10
      iam thinking clogged cat....
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    11. 03-08-2012 02:50 PM #11
      did it smell like rotten eggs? im not too familiar with the a4 since i just bought one but have years and years experience with dsm's sounds like you melted part of the cat(the inside) causing too much back pressure off the turbo causing it too glow red. You will have oil being burnt up a little since the bearings are getting over heated from the turbo itself. Since you have a secondary o2 delete you wont throw any codes unless you get too much backfire and it causes a misfire in one of your cylinders.

    12. Junior Member illadelphia1.8t's Avatar
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      03-08-2012 05:42 PM #12
      Now its in the 4 to 5lb range and it has no cel can it go limp with out cel? I can't take the cat off till I get money

    13. Member hammeredGLI's Avatar
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      03-08-2012 09:13 PM #13
      find someone with vag-com to log it..
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      03-08-2012 10:17 PM #14
      i cant imagine that a turbo would fail with these symptoms. i would say plugged cat.

    15. Member GOODBYNAAIR's Avatar
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      03-09-2012 07:18 PM #15
      I have APR stg 1 on my car with intake and DV and just put in a test pipe with the stock exhaust. I can see the difference in how fast the k03 spools up now ! 2.5 " coming, but that stock cat holds so much back on the turbo. good luck look into a HFC or TP worth the money

    16. Junior Member illadelphia1.8t's Avatar
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      03-10-2012 12:06 PM #16
      I can get my exhaust shop to make a test pipe for 170 installed or buy a premade one so I'm not sure what route to go any differences in them? Thanks

    17. Member GOODBYNAAIR's Avatar
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      03-10-2012 12:32 PM #17
      other then price, you can get it off ebay for 100 ish bucks that works or one from 034 motor or atp for like 150 ish all bolt on come with hardware

      http://www.034motorsport.com/engine-...18t-p-440.html

      http://www.atpturbo.com/mm5/merchant...Code=AUDIVW-DP

      http://www.ebay.com/itm/1996-2005-B5...#ht_1532wt_952


      I just got this one (ebay) ^^ the fit is not bad. it all bolts up to what the stock cat was. some other people have used it too

      Last edited by GOODBYNAAIR; 03-10-2012 at 12:35 PM.

    18. 03-10-2012 04:27 PM #18
      Quote Originally Posted by GOODBYNAAIR View Post
      other then price, you can get it off ebay for 100 ish bucks that works or one from 034 motor or atp for like 150 ish all bolt on come with hardware

      http://www.034motorsport.com/engine-...18t-p-440.html

      http://www.atpturbo.com/mm5/merchant...Code=AUDIVW-DP

      http://www.ebay.com/itm/1996-2005-B5...#ht_1532wt_952


      I just got this one (ebay) ^^ the fit is not bad. it all bolts up to what the stock cat was. some other people have used it too


      you should throw a spacer on that secondary o2 so your dont get a CEL

    19. 03-11-2012 03:27 AM #19
      Your cat is clogged, which is causing way too much back pressure. That in turn is making your turbo overheat, because the exhaust isn't exiting like it should. I have a Labree HFC for sale, if you want to go that route. Or an ebay test pipe will be good.

    20. Member SinsearJetta's Avatar
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      03-11-2012 04:13 AM #20
      I got my test pipe for $75 shipped from the classifieds on vortex...They are out there you just need to look....$170 is way to much for a test pipe
      Pirating will never DIE!

    21. Member bc_awd_98's Avatar
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      03-11-2012 06:40 AM #21
      My ebay test pipe didnt fit. Front o2 would hit the block. So i ran with out a secondary o2 for a wile till i just made my full tbe. Then both sencors went out. Primary. Replaced it. Then secondary. Yet to replace as its not a big deal. 98 aeb

    22. Member hammeredGLI's Avatar
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      03-11-2012 07:19 PM #22
      any change?
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    23. Junior Member illadelphia1.8t's Avatar
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      03-11-2012 07:28 PM #23
      I was looking around the engine and found the vac line running across front of engine towards Turbo area was completely split so I rigged it back and it is now holding around 14 psi I still am gonna rip the cat out though thanks

    24. Member demonmk2's Avatar
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      03-11-2012 07:40 PM #24
      Quote Originally Posted by illadelphia1.8t View Post
      I can get my exhaust shop to make a test pipe for 170 installed or buy a premade one so I'm not sure what route to go any differences in them? Thanks
      RAI sales one for that much, plus it has the J bung so no cel
      and yes it works.
      Any VWs made after 92 are usually only good for drive train donors.

    25. Member GOODBYNAAIR's Avatar
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      03-11-2012 09:43 PM #25
      "you should throw a spacer on that secondary o2 so your dont get a CEL"

      I have seen this what site was it on ?

    26. Member demonmk2's Avatar
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      03-12-2012 06:27 PM #26
      use a non fowler spark plug spacer. they are in the help section at the parts house. I think the drill bit size I used was a 7/32 or 17/32 which ever is the biggest of the 2. then you will need to sand or file the lower inner dia. for exact fitment.
      Any VWs made after 92 are usually only good for drive train donors.

    27. Member hammeredGLI's Avatar
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      03-12-2012 07:25 PM #27
      Quote Originally Posted by demonmk2 View Post
      RAI sales one for that much, plus it has the J bung so no cel
      and yes it works.
      i run that set up and i still get a cel on occasion for 02 low activity.. or w/e.

      i clear it and then wait til it comes back.

      so its not full proof
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    28. Junior Member illadelphia1.8t's Avatar
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      03-13-2012 07:09 PM #28
      When I replace the cat with test pipe do I need gaskets and hardware?

    29. 03-14-2012 12:00 AM #29
      yes you need gaskets and hardware if your removing a factory cat...


      Had this problem a few months ago on the passat 1.8T AEB. Breather system was plugged up and got the turbo so hot i could light a cigarette off of it (and did...)

    30. Junior Member illadelphia1.8t's Avatar
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      03-14-2012 09:13 AM #30
      I ordered a test pipe today I'm gonna try to get it done this weekend if I can make time I will reply if it helps thanks for all of you insight everyone don't know how I did it before forums

    31. Member GOODBYNAAIR's Avatar
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      03-15-2012 07:45 PM #31
      Quote Originally Posted by hammeredGLI View Post
      i run that set up and i still get a cel on occasion for 02 low activity.. or w/e.

      i clear it and then wait til it comes back.

      so its not full proof

      http://www.034motorsport.com/fabrica...e-p-20198.html

      so this or what RAI has should work. no CEL yet if this comes up sorry for the noob ish but it will not hurt my car right running it like that ??

    32. Junior Member illadelphia1.8t's Avatar
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      03-21-2012 07:54 PM #32
      Got the test pipe on but the Turbo is still getting really hot its making boost now so any ideas

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