Worrying about smog test results and very low local MPG (89 Integra)

Discussion in 'General Motoring' started by Edward Huang, Jul 29, 2003.

  1. Edward Huang

    Edward Huang Guest

    89 Integra with 150,000 miles on it.

    2500 RPM

    limit avarage yours
    HC(ppm) 140 20 53
    CO(%) 1.00 0.1 0.4
    CO2(%) 14.2
    O2(%) 1.0

    IDLE(800 RPM)
    limit avarage yours
    HC(ppm) 120 29 112
    CO(%) 1.00 0.1 0.08
    CO2(%) 14.4
    O2(%) 1.0

    The HC result when idle was too close to limit. And the gas consume is
    very high in local (San Francisco, city). No more than 10 MPG. But on
    freeway, it's pretty good, about 30 to 40 MPG.

    So what's wrong with it? PCV or O2 sensor?

    Edward Huang, Jul 29, 2003
  2. Edward Huang

    SoCalMike Guest

    sounds like O2, with a possibly bad cat converter.
    SoCalMike, Jul 30, 2003
  3. Edward Huang

    Edward Huang Guest

    Somebody said that it might be misfire. What does that mean? How to
    correct it? Thanks!
    Edward Huang, Jul 30, 2003
  4. Edward Huang

    SoCalMike Guest

    misfiring is usually related to plugs/cap/rotor/wires, or a vacuum leak.
    SoCalMike, Jul 30, 2003
  5. Edward Huang

    Sean Dinh Guest

    Since it passed the People Republic of California test, I won't worry if
    it's my car. :)

    Did you change the air filter before the test?
    Sean Dinh, Jul 31, 2003
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