smog

  1. D

    Check engine light came on after purchase

    So I recently just bought a 94 YJ with a 4.0l straight 6 with 134k miles on it. When I test drove it there was no check engine light on but when I took it home the next day and washed it the engine light came on with error code 21 & 33. 33 had something to do with the AC which it doesn't even...
  2. J

    Jeep TSB 25 001 07 Smog readiness FULL DIY

    After waiting FOREVER for the emissions systems to be "ready" on the TJ, we took it upon ourselves to do a fix the dealer was declining. This quick fix will allow your jeep wrangler to pass smog in flying colors! Hope this helps and please reach out with any questions! https://youtu.be/I1C5FxOyWOY
  3. B

    1990 YJ 4.2L Gross Polluter Running Rich

    I have a 1990 Jeep Wrangler 4.2L manual that I have been trying to pass smog in CA. The Jeep has been running pretty good for an old vehicle and my mechanical experience has been growing vastly since I have had her. She is running 33's w/ stock gears and has 130,000 miles. Here are the Max and...
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