Emissions and Smog Testing

Working Hours
  • Mon 8:00AM - 7:00PM
    Tue 8:00AM - 7:00PM
  • Wed 8:00AM - 7:00PM
    Thu 8:00AM - 7:00PM
  • Fri 8:00AM - 7:00PM
    Sat Closed
  • Sun Closed

Emissions and Smog Testing

At Tim's Automotive Repair and Sales, we help our Clackamas customers' cars run as cleanly and efficiently as they possibly can. We provide a range of emissions testing services to ensure that your car is running and driving its best, as well as complying with all local smog regulations. Should a problem arise with any of your vehicle's emission systems, we provide the parts and expertise to get you back on the road. Tim's Automotive Repair and Sales can replace mufflers/catalytic converters, refill diesel exhaust fluid, and make sure the full range of filters in your vehicle's exhaust system are working perfectly.

Regulators understand that older cars simply can't meet modern emissions standards without extensive modifications. For newer cars however, passing a smog test is a requirement of road legality. Call us at 503-656-0600 to learn more about the emissions requirements for your vehicle.

Emissions testing (also known as smog testing) is a vital part of the maintenance of your vehicle. E-tests provide your mechanic with important information about your car's engine and exhaust system. If important components, like your car's catalytic converter aren't working properly, the car isn't running as it was intended to by the manufacturer. Inefficiency costs you extra money in fuel and does unnecessary harm to the planet. Emissions testing can also affect the value of a vehicle you're trying to sell; while you can still sell a car without a valid e-test certification, you'll get more money for one that has passed the test.

There are several reasons that a car may fail its emissions test. There may be a problem with the vehicle's fuel system adding too much fuel to the air-fuel ratio required for proper combustion within the cylinders of the car's engine. This is known as "running rich" and results in the smell of gasoline from fuel passing through the engine and exhaust system without being fully burnt. Causes of this issue range from faulty fuel injectors to issues with the engine's control computer. There may also be problems with oxygen sensors or the vehicle's ignition system. At Tim's Automotive Repair and Sales, we use a complete set of diagnostic equipment to determine the problem and fix it quickly, explaining every step of the process to you, our valued patron. Call us at 503-656-0600 or send us an email to arrange a health check for your car's emissions system today!

What People Say About Us


  • -Joseph R.

    I was looking for a new auto mechanic I had thought about Tim's and when I looked at AAA site for mechanic's there he was at the top - sealed the deal . I went and talked to Julie at front desk I asked a lot questions I was hooked , had my car towed to Tim's they worked on my car good to go know. I'll be with them for quite a while.


  • -Micah A.

    This has been my inlaws family's mechanic for years and through their recommendation I took my vehicle to them. I had a good experience with this company taking my vehicle to them. They have fair and competitive pricing for their services. We worked out a plan to address upcoming maintenance done on my vehicle. Without going into much detail they were very honest with me, I commend them for their honesty. Marty and Kim up front were great to work with. I highly recommend anyone to bring their vehicle to them. I will be using their services in the future.


  • -Joe P.

    Friendly, professional, fair price. Car was ready exactly when they said it would be. I will definitely be returning. Thank you!


  • -Wyatt S.

    I have had the best experience I could've asked for. They have made sure all of my expenses have been covered by insurance. I was hit head on by a cop, when you get hit by the city they make you pay up front and they reimburse you. For the first month I had a rental car from enterprise and insurance stuck me with a $600 bill on top of what they covered so I got rid of my rental and went with a rental from Tim's its not a 2019 but it is completely covered by Tim's and is a reliable car that has gotten me to and from work and all my errands. With all of the work done to my car insurance should have totaled it but I can't even tell my car was in a accident. Through out this whole endeavor I have felt like Tim's had my best interest at heart and didn't let insurance make me go with used parts like they were telling me I had to go with when I was going to go with the "preferred shop" they told me to go with.


  • -Kenny D.

    I have been doing business with Tim's Auto for the last 10 years. I have a Construction company with as many as 6 trucks and 3 trailers called Douglas Construction. Tim has been doing the Maintenance and repairs on all my trucks and trailers as well as my personal vehicles for the last 10 years. The service is excellent and in most all cases Tim goes and picks up my trucks if they broke down in the field. I am totally confident in there Mechanics and there ability to keep my vehicles driving safely. I and my friends have also bought vehicles from Tim's, and even picked them out at auctions, through Tim's Auto. Tim himself has become a friend as well as a business associate over the years. Personally I wouldn't Take my vehicles any where else.


  • -Joyce B.

    It's a pleasure to have your car serviced by honest and knowledgeable mechanics who stand behind their work. I feel great having these guys as my service techs!


  • -Anita F.

    Great guys, they go out of their way to be helpful.


  • -Holly D.

    Been a customer of Tim's for over 20 years. Buy my cars here and would not consider going anywhere else for tires, tune-ups, oil changes, body work or anything else to do with my car.


  • -Mark F.

    Always great service. They stand behind the work they do, haven't had any problems in the 15 years plus years I have been having my vehicles repaired there.


  • -Joseph R.

    I was looking for a new auto mechanic I had thought about Tim's and when I looked at AAA site for mechanic's there he was at the top - sealed the deal . I went and talked to Julie at front desk I asked a lot questions I was hooked , had my car towed to Tim's they worked on my car good to go know. I'll be with them for quite a while.

Call us for service: 503-656-0600

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