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How do you pass a smog test, and what do you do if your car fails?

9 Answers

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Make sure your car's fuel injector, oxygen sensors and catalytic converter is fine before smog test.

To get it checked visit nearest service centre.

If your car fails PUC test, then do it again after complete scan and servicing.
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It probably cost alot. !maybe another car even though it's expensive. Or mechanic and or a student. Some highschool kids or college would love to help. Just post where ever on can. !maybe even here if your allowed 
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Fill up the coolant and gas tank

Get pre-inspection

Drive past two weeks before a test

Make sure the battery has not been recently disconnected
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If your car fails a smog test, you must continue driving it as is and wait for a chance to pass a new test. You may need to drive it in a special container that symbolizes a smog test.
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To pass a smog test, you need to ensure that your vehicle's emissions are within the acceptable limits set by the state or country's regulatory agency. Here are some tips on how to pass a smog test:

1..Ensure your car is in good condition: Regular maintenance can prevent many issues that cause a car to fail a smog test. Replace any damaged or malfunctioning parts, change your oil regularly, and keep your tires properly inflated.

2.Warm up your car before the test: Start your car and let it run for about 10 to 15 minutes before taking the test. This helps ensure that the engine is at its optimal temperature, which can reduce emissions.

3.Drive your car before the test: Drive your car for at least 20 minutes before the test. This can help burn off any excess fuel and other pollutants in the engine, reducing emissions.

4.Use a fuel additive: Certain fuel additives can help reduce emissions. Check with your mechanic or local auto parts store for recommendations.

If your car fails a smog test, you may need to get it repaired before it can pass. The specific repairs needed will depend on the reason for the failure. In some cases, the repair may be covered under warranty or recall. You may also be eligible for financial assistance to make the necessary repairs. Check with your local DMV or smog testing center for more information.
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Ensure your car is in good condition: Regular maintenance can prevent many issues that cause a car to fail a smog test. Replace any damaged or malfunctioning parts, change your oil regularly, and keep your tires properly inflated.
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maybe another car even though it's expensive. Or mechanic and or a student. Some highschool kids or college would love to help. Just post where ever on can. !maybe even here if your allowed 
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1..Ensure your car is in good condition: Regular maintenance can prevent many issues that cause a car to fail a smog test. Replace any damaged or malfunctioning parts, change your oil regularly, and keep your tires properly inflated.

2.Warm up your car before the test: Start your car and let it run for about 10 to 15 minutes before taking the test. This helps ensure that the engine is at its optimal temperature, which can reduce emissions
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It depends on if your state has actual smog guages they put inside your tailpipes, or if they only use a mirror to look up under vehicle for catalytic converter...if it's just mirror, you can cut a whole in top of converter, take out honeycomb material inside, and button back up converter free of baffles...However, if they actually guage it, you're screwed..Thanks for asking..I used to own a muffler shop
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