99 CRV, reduced gas mileage after timing belt replacement

Discussion in 'CR-V' started by DelCRVOwner, Mar 14, 2006.

  1. DelCRVOwner

    DelCRVOwner Guest

    I am the original owner of a 99 CRV, 2 wheel drive. I have always
    monitored the gas mileage closely - I mentally calculate it just about
    every time I fill the tank - and it's always averaged about 25 mpg.
    The mileage is about 112,000

    About 6 weeks ago, I had the timing belt, water pump, and drive belts
    replaced by a Honda dealership. They also changed the oil, replaced
    the spark plugs, and the left engine mount, which they found was broken

    when doing the timing belt work. Within the same week, I replaced the
    tires (Costco, Michelin X Radial DTs) and had the front end aligned by
    the dealership. I replaced the air cleaner myself.

    Ever since this work was done I'm averaging 22 mpg. Nothing has
    changed about my driving patterns, or where I get gasoline. I've
    contacted the dealership and
    they've told me that it is not possible that the work they did caused
    the gas mileage reduction. (I consider this to be a reputable shop,
    I've had work done there several times over many years) The advisor
    also implied that this really wasn't anything to be concerned about,
    and there isn't anything that they can "check" to find the
    cause. As I told him, I disagree, this is >10% reduction in gas
    mileage which is going to cost me about $250 / year.

    So I'm hoping an expert can advise, is it really just a coincidence
    that my gas mileage dropped after this work?
    DelCRVOwner, Mar 14, 2006
  2. DelCRVOwner

    Alan Guest


    Are the tires the same size as the previous ones? Perhaps the O2 sensor
    could need replacing.
    I don't know if the tension on the new belts would make a difference.
    Alan, Mar 14, 2006
  3. DelCRVOwner

    Eric Guest

    Well my first thought was to check the engine's timing, both mechanical
    timing and ignition timing. However, it could also be related to the tires
    if they're sized differently from your original ones or are under inflated.

    Eric, Mar 15, 2006
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