For 1999 and older drive your vehicle for at least 20 minutes prior to arriving at the smog station. This will ensure your vehicle is properly warmed up and is running at it’s optimum level. Remember your engine is a fuel burning machine. To ensure proper combustion it needs to have sufficient time to warm-up and this can be accomplished through driving for at least 10 to 15 miles.
Contaminated oils are high in Hydrocarbons (HC) and will present a rich mixture to the engine chambers. Avoiding oil changes not only causes pre-mature engine wear but can also cause your vehicle to fail the smog inspection. Change the engine oil.
Make sure your vehicle’s Check Engine Light or Malfunction Indicator Lamp is not illuminated. A constantly illuminated Check Engine or MIL light is an automatic smog failure.
Note: A smog technician can not refuse to test your vehicle based on the fact that he or she notices an illuminated light. The smog technician must perform the smog check and fail your vehicle. This is California State law.
Make sure your vehicle’s battery has not recently been disconnected. If your vehicle recently needed a jump start or battery replacement we recommend holding off on getting the smog check for at least one week. Whenever a vehicle’s computer losses power, such as when it’s battery has been disconnected or charge depleted, its internal self-test monitors are erased. Without these required Emission Monitors your vehicle can not pass the smog test. You will be required to drive between 50-100 miles preferably in one shot when engine is cold, this process is called a Drive Cycle, in order to “complete” the emission monitors and be allowed to pass the smog check. Please feel free to ask us to check before testing.
Make sure ALL emission related after-market parts have Executive Order Numbers or your car will fail. No Exceptions. Sticker or welded if necessary. Ask before test if you are not sure.
If you are unsure of anything going on with your vehicle or afraid your car will fail ask us before your test. We are here to help.
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