1992 Accord failing emissions test

Discussion in 'Accord' started by Jimbo, Sep 1, 2006.

  1. Jimbo

    Jimbo Guest

    I have a 1992 Accord EX 4 door auto with 184,000 miles on it.

    It runs fine except for two problems. The latest is that I've failed
    emissions with a CO% score of 1.97 it should be <.50 at idle and a
    score of 2.07, it should be <.73 at 25 MPH. I passed both of the HC and
    the NO tests. The car was warmed-up for an hour before the test.

    This was my second attempt. I actually did better on the CO idle test
    before I changed the spark plugs to the Bosch dual-tip platinums.

    I had the O2 sensor replaced in February. After that repair, the green
    "D" light on the transmision indicator started blinking which is my
    other problem. The repair shop said that it was coincidental that the
    blinking started after the O2 sensor was replaced. Since the car ran
    fine, I just lived with it.

    Is there a connection between the two?

    Thanks in advance,

    Jimbo, Sep 1, 2006
  2. Jimbo

    TeGGeR® Guest

    What are your ACTUAL numbers for ALL gases?

    Was there any CO2 reading?
    TeGGeR®, Sep 1, 2006
  3. Jimbo

    marco Guest

    Just out of curiosity.. What kind of plugs did you replace with the
    Bosch dual-tip Platinum plugs?

    marco, Sep 1, 2006
  4. Jimbo

    Jimbo Guest

    Jimbo, Sep 1, 2006
  5. Jimbo

    jim beam Guest

    suspect weak spark or dribbling injector. the latter is fixed with
    injector cleaner, the former by servicing the ignition system. stick to
    ngk plugs. spark plug leads get weak after time. also, does your
    accord have an ignition condenser? if so, consider replacement.
    jim beam, Sep 1, 2006
  6. Jimbo

    Jimbo Guest

    I agree, however, the NGKs that Ipulled were in perfect shape at 26,000
    miles except for the gap was huge. If the wires were suspect, wouldn't
    there some signs of fouling.

    I put in some Chevron Techtron and filled the tank with Chevron HiTest.
    Jimbo, Sep 3, 2006
  7. Jimbo

    jim beam Guest

    not necessarily - spark would have to be mostly absent for that. weak
    spark can be a strange beast to hunt. leads can give problems at any
    time. i had a new set of oem leads on my civic, and they started giving
    problems after only 20k miles. plugs always looked fine. these days,
    i'm running magneor electrosport leads, and while i'm usually a big
    advocate of honda oem componentry, there's no doubt the magnecor's
    perform much better across the whole rev range.
    jim beam, Sep 3, 2006
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