Change the spark plugs – Changing out spark plugs is relatively quick and easy. With old or dirty spark plugs you run the risk of a misfire and this can easily fail your emissions test.
Replace the Fuel and Air Filters – You need both of these filters clear to ensure the proper mix of fuel and oxygen in your engine
Change your Oil – You guessed it. A simple oil change can get your tailpipe to stop coughing and spluttering black smoke
PCV Valve Replacement. The Positive Crankcase Ventilation is a system that recycles unburned fuel back into your engine for combustion. This valve can often become mucked up with sludge, replacing it can greatly affect your Emissions Test Score.
Adjust ignition timing –Your idle speed may be set just a few hundred RPM’s too high. This can easily contribute to a failing readout.
For older cars, ensuring the carburetor is in good working order can also greatly improve the odds of passing.
If you really want to ensure that you pass the emissions test and steer clear of P0420 or PO420, you can fill your tank with premium gasoline and take your car for a quick drive up the freeway. This brings your car to normal operating temperature and heats up the oxygen sensor and catalytic converter, which minimizes emissions. Catalytic converters are important and they contain some precious metals which are often stolen and sold for scrap. Regular check-ups can help ensure that these stay in top form and that they’re still where they need to be.
For exhaust or muffler repair and checking or catalytic converter repair, drive to Virginia Auto Service in Phoenix and let our technicians quickly and efficiently service your car.