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Q: How often should change my gas cap?

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How often should I change my gas cap on a 2003 Impala with 72000 miles to pass the emission test?
My car has an automatic transmission.

A: Hi, thanks for writing in. There is no real...

Hi, thanks for writing in. There is no real recommended replacement interval for gas caps. They are one of those "use it until it fails" parts. If you feel your gas cap may be going bad, then it may be a good idea to replace it.

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What others are asking

Q: Truck goes into reduced power. I have to stop, remove the key from ignition, remove gas cap, and put the gas cap back on. Truck some times will do this 2 to 4 times.

Hi there. Check the gas cap seal and see if there is a crack on it or if there is a distortion on the seal. If there is, I recommend replacing the gas cap. The gas cap seal is designed...

Q: Emissions test failed with a new gas cap

Hey there. This may be related to other possible malfunctions in your EVAP system, such as a faulty vent valve solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects...

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Hello. If the gas cap is verified to be good, the most common culprits are the purge valve and charcoal canister. If you would need help having this checked, a certified technician from YourMechanic can come to your car's location...

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