Fourtitude.com - 86 jetta cis blowing smoke aka failed emissions
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    1. Member
      Join Date
      Jun 15th, 2013
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      86 MK2 Jetta GL; 98 MK3 Jetta GT
      04-20-2017 04:35 PM #1
      So I might have an issue with either rings or valves. Would a compression tester help eliminate the rings by doing a dry run then a wet run?
      I added the no smoke but I guess I did it too late to take effect.
      1986 1.8 cis is all stock. If it's just the valves should I just get standard or upgrade and do a cam at the same time?

      Sent from my LGMS631 using Tapatalk
      JoshuaT

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    3. Member
      Join Date
      Jun 15th, 2013
      Location
      North Las Vegas
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      86 MK2 Jetta GL; 98 MK3 Jetta GT
      04-20-2017 04:42 PM #2
      I don't need to upgrade but all the kits I've seen on techtonic tunings are all upgrades.

      Sent from my LGMS631 using Tapatalk
      JoshuaT

    4. 04-20-2017 08:29 PM #3
      A compression test would help, but a cylinder leakage test is a bit better to locate the main cause. If they turn out to be ok, I would take a look at the guide seals. They have a tendency to harden over years and the engine surely will drink the oil.

      What failed on the emissions test, HC, CO, NOx?

    5. Member
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      86 MK2 Jetta GL; 98 MK3 Jetta GT
      04-20-2017 09:26 PM #4
      Visible smoke failed it.

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      JoshuaT

    6. Member
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      86 MK2 Jetta GL; 98 MK3 Jetta GT
      04-20-2017 09:53 PM #5
      Would this be the best?
      http://www.speedwaymotors.com/Compre...fXoaAkh78P8HAQ

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      JoshuaT

    7. 04-21-2017 09:01 AM #6
      That would work, but once you found the compression was low, then where do you go from there?

      That is where the cylinder leakage test is better.

      Have you tried the local parts store like O Reilly's? They may have a loaner tool program for free.

    8. Member
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      Jun 15th, 2013
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      North Las Vegas
      Posts
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      86 MK2 Jetta GL; 98 MK3 Jetta GT
      04-21-2017 10:29 AM #7
      Nope I hate borrowing tools. I'd rather buy one just in case.

      Sent from my LGMS631 using Tapatalk
      JoshuaT

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