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How to Pass an Auto Emissions Test. To get or renew your vehicle registration, and cut
down on pollution, you may need to pass an emissions or smog check test. You will need
Oil change and tune up Properly inflated tires Gas cap 30-minute highway drive Premium fuel
DMV paperwork and fuel additives (optional). Step 1. Get an oil change and tune up, and
check your air filter. Make sure there are no fluid leaks, dashboard warning lights on,
or safety issues. Step 2. Make sure your tires are properly inflated, in good condition,
and are the original size for your vehicle. If you installed the wrong size tires, it
may affect the test equipment or not allow the test to be performed at all. Step 3. Have
a proper gas cap on your car. A vehicle without one automatically fails the test. Step 4.
If you only drive the car rarely, take it for a 30-minute or longer ride the week of
the test, preferably on the highway. Step 5. Fill up your tank with premium gas, which
is cleaner and better for the environment. Consider adding fuel additives to the gas
tank, which clean carbon deposits in your engine and lower emission levels. Step 6.
On test day, drive your car at least 30 minutes right before the test so it will reach optimal
operating temperature. Try to get the test within 15 minutes of your arrival, so the
car is still warmed up. Step 7. Bring your DMV paperwork with you to the testing facility
so they can scan the bar code it contains. If not, you may pay extra for them to look
up the vehicle identification number. Did you know The Clean Air Act of 1970 gave the
Environmental Protection Agency authority to regulate motor vehicle pollution.