How to Pass a Smog Test
Smog test also known as emission testing is a requirement in many states to have the vehicles tested to see if they pass certain emission standards. These tests are conducted to improve the air quality in the state and vehicles which don’t clear the smog test will not be given a smog test clearance certificate and the vehicle registration won’t be renewed until you repair the faulty component, and have it retested again. And if you are preparing for a smog test, please keep in mind the following things.
Before going for a smog test, better empty your tank of any old gasoline and fill it with some fresh gas. Because fresh gas is very effective than gas that is been sitting in your vehicle for a week. Better use higher octane fuel as it tends to burn faster than other gas causing lesser emission and a leaner combustion. And what this means that the vehicle emits less amount of HC and CO emissions.
Properly Inflated Tires
Make sure to have your tires inflated to the allowable limit and have your vehicles checked on a dynamometer to test for low and medium speed driving conditions. If you vehicles are inflated properly then it causes less friction on the roads making the engine to work smoothly. And a smooth engine burns fuel more effectively and releases less emissions.
If you have tuned your vehicle properly, then you don’t need to worry about the smog test at all. As well-tuned vehicle will not have any issues like a misfiring spark plugs, carburetor problems or fuel injection clogging etc. Make sure that your vehicle is inspected for exhaust system, points, plugs and the air cleaners too. If needed do an oil and a filter change too to seal the combustion chamber and set the choke properly. This will ensure you pass the smog test easily without any problems.
Check for Leakage
If you have any leakage issues in your vehicle including oil, coolant of any transmission fluid leakages, the smog inspector will not pass your vehicle. Because any leakage means you have some minor or major engine problems and poses a safety issue for your vehicle. Even if your vehicle overheats and leaks during the smog test, you will fail the test. So make sure to have your radiator filled and have it checked for any leakages before going for a smog test.
Many people fail in the smog tests because of the engines not reaching the minimal operating temperature. During the smog test, you will be asked to run the engines for a while to have it heated up thoroughly and checked for the temperature levels. And if you think you it means just idling, you are wrong, but you will be asked to have a long run on the freeway before the smog test to see how your engines heat up.
Even a small problem can make you fail in the smog tests. Make sure to check if your filler gas caps are sealed properly. If you have a loose gas cap then it can easily trip making the “Check Engine” light flashing.