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    Thread: 16v Digfant II FAQ

    1. Junior Member snowj420's Avatar
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      1987 16v gti, 1991 8v gti, 98 jetta gls
      01-28-2007 09:30 PM #701
      what is a "Digifast Chip from vw pilot on the tex"? i'm about to do a swap and this is the only thing i can't figure out from your post. everything else is crystal clear. thanks for posting this in such detail. it's going to make this little dream of mine come true finally, a hot little 16v (from my 87) into a beautiful 91. i can't wait to post pics of it when it's done.

    2. 01-29-2007 01:13 AM #702
      vw_pilot@hotmail.com just ask for a chip. best $ ull spend on this swap. [IMG]http://**********************/smile/emthup.gif[/IMG]
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    3. Member GutlessLump's Avatar
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      01-29-2007 10:15 PM #703
      agreed, it really smooths everything out, just dont expect a hp gain. i really didnt notice anything other than better drivability.

    4. Senior Member MFZERO's Avatar
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      02-10-2007 01:13 PM #704
      just wanted to throw these in here, dyno'd my swap with just a header, 264's, stock digi2 everything else, removed the inlet fom the air box and deleted one muffler:



    5. 02-10-2007 01:30 PM #705
      nice power. [IMG]http://**********************/smile/emthup.gif[/IMG]
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    6. Senior Member MFZERO's Avatar
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      02-10-2007 01:41 PM #706
      thanks! everyone there was impressed when I hit that. I think the car may have been off for all of about 5 minutes after i drove 40 minutes to the dyno then I went right in and was strapped down. i think it might be a little higher if it were cooled off. need to chip it to get the a/f better

    7. Member Jankenstein's Avatar
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      02-13-2007 05:24 PM #707
      Nice Thread you guys got here. i havent had time to read the whole thing but i did happen to find a few people that have been expieriencing similer idle issues at start up...but have found little in terms of a solution?
      let me start by mentioning that i completed my swap 2 years ago this spring. i kept mostly everything stock with the excpiton of a chip and the standard breathing mods. and i must say it was by far the most simple way to put a 16V into a late mk2! Everything went Smoothe and with the excption of having my feed/return fuel lines swithched somehow ...
      the car started/ran/revved and pulled hard off the first crank. the only issue that had me purplexed was that of a serious bogging when i gave it full throttle from idle. i thought it was an ignition issue but with everything set up to the book the hesitation was quite evedant.
      after alot of playing around, trying slightly different settings of timing Air/fuel mixture and idle i finally got it to idle just over 900 rpm and rev up smoothely right from idle...to 7000(as far as ive taken it)....
      However it comes not with out SACRAFICE.
      since clearing this hesitation up it has the worst time finding an idle for about the first 30 secconds after start up. it revs up and dies off back and forth seemingly hunting for a specific range. it always settles down and is problem free with great idle and strong accelleration.
      i havent tried setting back to exact spec because its only been taken out slightly.
      As for that problem ill keep plugging away at a few ideas that i have to solve this and ill keep updatad.
      But one thing i have been curious about is my crankcase breather hose. Should that be meterd air or not ive seen people run it both ways. into the intake pipe, into the bottom fo the air box and not at all with just a little cone filter on it. whats standard? id like to hear any input on this.
      other than that i couldent have a more reliable fun to drive mk2 for the money i have into it!
      thanks for reading
      cheers
      Modified by mikejank at 10:29 PM 2-13-2007


      Modified by mikejank at 8:05 PM 2-16-2007
      Nobody stomps on a burning bag of $hi+ anymore.... Nobody.

    8. Member ryansux's Avatar
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      02-13-2007 06:53 PM #708
      unplug your isv, and set the idle manually....yay I hate those isv's
      "At 6000 RPM there is no surrender"

    9. Member Jankenstein's Avatar
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      02-14-2007 12:29 PM #709
      ive done that before and it wont start when its cold that way.....or maby its when its warm..i cant remember. dident work for me
      agree on the hatred for those POS ISV's!
      Nobody stomps on a burning bag of $hi+ anymore.... Nobody.

    10. 02-28-2007 02:35 AM #710
      iv never had a problem with my isv being unplugged in fact it seemed to clear up idle issues. i would not suggest using a cone filter this method has proven to be dirty

    11. Member 8mann's Avatar
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      02-28-2007 07:26 PM #711
      If I didn't know any better, I would have thought I wrote your message. I have the exact same idle issues you describe. I have tried a number of things and can't seem to resolve them. Maybe my next move would be to remove the ISV.
      I am curious to hear what people think on the Crankcase vent. I have had it vented into the intake and also floating loose. Didn't notice any difference other than the build up of oil in the intake. My current setup is just floating the hose into the bottom of the filter box.
      '07 Audi A3 3.2 S-line Quattro
      '03 Passat V6
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    12. 02-28-2007 10:05 PM #712
      my crankcase vent is routed into the intake. i took it apart recently when i did my timing belt. for 2 years of beating the snot out of this PL, i had very little oil on my throttle body. ive seen filters slapped on the end, but why fix what aint broke [IMG]http://**********************/smile/emthup.gif[/IMG]
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    13. Member GutlessLump's Avatar
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      03-02-2007 01:24 PM #713
      Quote, originally posted by 8mann »
      . I have had it vented into the intake and also floating loose. Didn't notice any difference other than the build up of oil in the intake.

      put some steel wool in the top of the vent line to catch the oil...works fine. just make sure that it doesnt have a way to get into the engine. i just crammed some in there and it never moves and still breathes just fine.
      i've ran my vent open to atmosphere and back to the box, noticed no difference in tail pipe emissions or performance either way.

    14. Member vdubmike2's Avatar
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      03-19-2007 11:54 PM #714
      if your swapping digiII into a cis 16v car do you have the change the fuel pump? i know the cis unit runs about 70psi while the digiII unit runs only about 30psi, would it wreck the fuel pressure regulator or is it fine the way it is? thanks
      Mike Davis Jr.

      PM me for collision repair/custom paint and body work in the Midwest

    15. 03-20-2007 11:29 AM #715
      it has been done before, but i cant recall the results. scrape this thread real good. its in here.
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    16. 03-21-2007 02:27 AM #716
      ok with this swap....is there a good difference...or a bad difference.....more power....less power.....etc.....i know if i were to do this...i have the opition of boost....but is there a huge change in anything.....cuz to tell u the truth...im tried of mine....cis-e motronic..

    17. Member vwpat's Avatar
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      03-21-2007 08:06 AM #717
      Quote, originally posted by MKII91’GTI »
      ok with this swap....is there a good difference...or a bad difference.....more power....less power.....etc.....i know if i were to do this...i have the opition of boost....but is there a huge change in anything.....cuz to tell u the truth...im tried of mine....cis-e motronic..
      Good difference, more smoother power but I would not boost with digi II, it is not digi I.

    18. 03-29-2007 01:42 PM #718
      heres another semi successful swap. definitely going to swap to MS in the future.

    19. Member 91GolfGL's Avatar
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      03-29-2007 05:28 PM #719
      What wiring harness can you use the 8V , 16V or either one?
      And what would you have to due to switch a digifont 2 car over CIS or what the 16V came as?
      Quote Originally Posted by VW_Jake View Post
      Can anyone tell me what's up with the MKIII and the ABS light (air bag system).. This is the second one I've had recently that the light comes on and stays.


    20. 03-29-2007 08:00 PM #720
      use the 8v one. u only have to lengthen the injector harness.
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    21. Member 91GolfGL's Avatar
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      03-29-2007 08:23 PM #721
      Thanks. But what if i can only get a 16V one will it still work.
      Quote Originally Posted by VW_Jake View Post
      Can anyone tell me what's up with the MKIII and the ABS light (air bag system).. This is the second one I've had recently that the light comes on and stays.


    22. 03-29-2007 08:38 PM #722
      a 16v harness? not on digi2. different sensors.
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    23. 04-09-2007 12:37 PM #723
      Alright guys, I've been having this intermittent problem that I thought I've fixed a few times, but so far I'm stumped. Its a '92 Jetta Digi 2 2.0 16v and its running rich all the time, I rev it up and I have a ton of black carbon shooting out the exhaust. The old engine that was in the car had a ton of carbon in the cylinders. I've replaced the MAF with another one I had when I had the problem a while ago, and it seemed to go away, I still had a gas smell in the oil, but the stuttering and lack of power went away. But now, with the new engine in, different CTS's by the way, I have the problem again, and its as bad as ever. I put a new O2 sensor on it, and I just checked and its putting out 300~600 mV at idle.
      The CTS is putting out about 3400 ohms, and even when I jumper the connector with a wire, it still runs rich if smell the exhaust. I don't know what else could cause it?
      It may be related or not, but I have a funky idle where sometimes it will idle at 1300, other times at 800, but a vacuum leak would cause it to run lean, and I don't have any other symptoms of a vacuum leak, I don't think so at least. I have another ECU I'm going to throw at it this afternoon, but I wanted to hear what you guys have to say about it.

    24. 04-09-2007 06:59 PM #724
      what ur ecu look like? stock? good condition?
      '11 Routan SE (black), '01 Jetta GLX VR6 5spd (silver)
      FE ///Motorsports VCDS Hex-Can, if you need help.

    25. 04-09-2007 08:54 PM #725
      Ive been reading thru this thread and it seems like people are making pretty decent hp gains. I have all my digi 2 stuff in boxes in the garage from when I swapped in my 16v...looking to do some tinkering and debated this before. also debated going digi and boosting. But if I can make some gains essentially for free then I might just do this to start. Whats everyones round about power gains?
      1992 Jetta gli gone and missed
      2010 Jetta sportwagen DSG pano and tdi

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