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Thread: Smog check in ca

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  1. Default Smog check in ca

    Seems like someone made a mistake in legislation
    and now DMV tells me that I have to smog my Honda GX...
    Yet 14,000 lbs CNG vehicle are still exempted.

    Or get some kind of paper from Bureau of Automotive Repair (BAR in Sacramento) saying that my car is exempt.
    I did call BAR (1800 952 5210) and “expert” Glen explained that
    14,000 lbs is a bus and if we divided emission produced between 80 passengers…. and so on, but today I’ve seen a garbage CNG truck without 80 passengers on board….
    He also compared burning temperature of NG and LPG!? (NG burn.temp. twice as lower)
    At the end he gave me phone number to schedule a smog check because not all smog check stations are equipped to test my car!... (1800 622 7733)

    I filed a complaint here (tel. 1866 799 3811)

    Meanwhile getting deeper in the subject I found this:
    (no comments)

    My car produced 10% of any Hybrids emission
    I have NG stove inside of my house as many others, this is safe and clean energy.
    And I’m not an idiot!
    Last edited by kika; 11-19-2008 at 09:08 PM.

  2. #2
    Join Date
    Dec 2007
    Left Coast

    Default Re: Smog check in ca

    CNG light duty vehicles are subject to the same smog check rules as gasoline or propane. This is nothing new. I have had no trouble getting smog checks when due on a '00 cng crown vic and '01 gx. My '08 will not be due for a few years.

    A cng vehicle can have problems causing excess emissions.

    Test equipment at any CA smog check station can test your car. The tech may have to search a little in the test software for the correct setup.

  3. #3
    Join Date
    Jun 2008
    Birch Bay, Wa & Joshua Tree, Ca

    Default Re: Smog check in ca

    I don't know who the BOZO was Kika was talking to, but he is way off base.

    Most of heavy duty vehicles (over 14,000 lb GVWR), on natural gas are, commerical vehicles and these vehicles have very rarely been SMOG checked mainly because they were diesels. I have seen some rare situations where a large truck was checked because it had a gasoline engine (549 cid International). Any vehicle over 10,000 lb GVWR has to have 2 speed idle test (no dyno) test in addition to the visual and functional tests

    The phone number (...7733) is the referee scheduling service, and that is for problems or "weird" vehicles. Lakewood is right on the money, any smog station can handle a CNG vehicle and there in no evap test on dedicated vehicles. The exception would be a conversion coming in from out of California, they would have to go to the referee if the conversion did not have a CARB E.O. number. If the conversion has an E.O. number, it doesn't not have to go to the referee. If a bi-fuel vehicle is smogged it tested "as received", on whatever fuel is was running on when it came in the door.

    The "SMOG machine" is menu driven. When the menu for vehicle fuel comes up all the tech has to do is click on the on which the vehicle is operating. The choice of fuels changes the "cut points" for passing the test taking into account non reactive hydrocarbons in the fuel and by-passes a couple of tests. There is also a menu that asked if the vehicle is bi-fuel.

    Several years ago, new vehicles were exempt from smog checks for the first five years of life (big mistake), unless it was sold; then it goes into the 2 year inspection cycle. If I figure correctly the 2004's should be coming into the smog test cycle to get the registration renewed

    If you want information on California Smog Check you can look up

    There is more information on that site than you want to wade through


  4. Default Re: Smog check in ca

    We believe in what we like to believe
    I believe that any CNG has to be smog exempt just because NG is clean burning oil.
    LPG is cleaner then Gas.
    NG is cleaner then LPG(what is Gas refinery product)
    We can compare, just to realize the differences ….
    NG burning temperature is lower by 200C! and so on…

    Sure enough it’s recognized in CA:
    At least where is my 15 years or 150 000 miles?

  5. Default Re: Smog check in ca

    You can complain all you want, but you will still have to get a smog inspection every 2 years in California and this will never change, if it did, it would be every year. I have had 2 done on my GX and it passed with flying colors. I wanted to scan/post it here, but their printer must have been low on toner cuz it's hard to read.
    BLUE 09 GX

  6. #6

    Default Re: Smog check in ca

    The hybrid exemption is because Sacramento hasn't figured out how to run a smog test for a vehicle that can run on batteries.

    When I took my Contour in to get tested, the service guys were fighting over who was going to run the test, because they had never smog tested a CNG vehicle before.

  7. Default Re: Smog check in ca

    I’m not just complaining HERE.
    There are authorities and senators to complain, web pages...
    How surprising that CNG passing the tests with “flying colors”? It does not surprise me.
    There are people who decided on that rule, obviously unqualified and illiterate, just greedy.
    What I’m doing is looking for like-minded men who will find a minute to make a phone call…
    post a complaint … do something.

    If someone knows what wheels to turn – let me know

  8. #8
    Join Date
    Sep 2007
    Lancaster, Ca (in the High Desert)
    Blog Entries

    Default Re: Smog check in ca

    The reason we have to smog is that a miss in the engine can take out the catalytic converter and your NoX rises above allowable limits. That's why we recommend always getting a miss checked out right away. These injectors are sensitive to oil and water and few change their filters as prescribed. If you use an old compressor blowing oil past the rings, even good gas won't save your injectors.

    Curtis Martin
    Program Coordinator
    Antelope Valley Clean Cities Coalition
    Cell # 661-492-5916

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