I have an '02 neon with 70k miles. The check engine light has come on indicating a large evap emission leak. I've changed the gas cap, pcv valve, spark plugs and wires and air filter. All of the hoses I can see look like they're in great condition. The car is used for city stop & go driving, so I use STP fuel injector & carb cleaner every other tank or so. Any ideas? Any one else have this problem?
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