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  1. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    It's been almost 2 years since my last post and it's time for smog check. So, changed synthetic oil and filter, air filter, filled up as usual with Chevron gas + 12 oz Techron concentrate. In 2011, HC went from 9/3 ppm at 15/25 mph in 2009 to 63/36 ppm at 15/25 mph. The car barely passed HC...
  2. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    Will do. Probably in a few months. I've heard conflicting opinions about using Nissan cats vs Magnaflow. Should I stick with Nissan OEM Cats? BTW, it is a 97 model and I believe not a 3-way Cat, introduced a few years later. Also, it is CA model.
  3. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    jdg, smj: thnaks for your suggestions. Was busy during the week to talk to my mechanic. Finally caught up today. He said he checked timing after rotor/cap/plugs/wire replacement and it was good. He describe the procedure which sounded similar to the definitive posting in this forum. ["sounded...
  4. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    Hi jdg, smj999smj: thanks a lot for your help. > As far as adjusting the timing, you shouldn't have to pay anything as it should have been performed as part of the major tune-up I've read the "definitive guide" on how to adjust timing and will ask my mechanic if he did check/adjust timing and...
  5. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    jdg, thank you very much for the response! >> If you ran the car with a misfire, there's a good chance you've done damage to the cat running it like that. Cat's don't like to be fed raw gas (i.e. due to a misfire). I didn't drive the car for more than 15 miles after the misfire. I was worried...
  6. 1997 Sentra GXE - NOX, HC emissions high

    GA-Series Engines
    All: 1997 Sentra GXE 4dr, automatic, AC, 123K miles - Bought new. - Replaced all spark plugs & wires after 4 years (28K miles) due to mis-fire in cylinder 1 - Oil/Filter changed every 3000 miles or 4 months - Air filter changed every 2 years - drive belts changed every 40K...
  7. 97 Sentra GXE - NOX, HC emissions high

    New Member Forum
    All: Happy owner of 1997 Sentra GXE 4dr, automatic, AC, 123K miles. Visited this forum often and decided to join now. Learnt a lot from the forum members even though I am not a hands-on person. I get my work done by mechanics but I can discuss car problems intelligently thanks to this forum...
  8. List your year, mileage and MPG

    GA-Series Engines
    1997 Sentra GXE, 122K, 29 city, 33 hwy 4 spd automatic, AC
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