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Old 02-02-2012, 12:35 AM   #1
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keep getting check gas cap on my 2007 buick allure already bought new cap and its still happening any suggestions pls
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Old 02-02-2012, 12:59 AM   #2
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Could be a bad vent solenoid.
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Old 02-02-2012, 07:36 AM   #3
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vent solenoid is the most likely, but it could be half a dozen other things in the evap system or a leak in the filler tube/tank/vacuum lines etc. do you have any codes?
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Old 02-02-2012, 04:30 PM   #4
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Try lightly sanding the filler neck (put a rag in the opening to catch any crap) where it seals to the gas cap, and apply a thin coat of grease to see if it seals the cap. Probably something of a more significant nature, but always good to check the easy stuff first.
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Old 02-05-2012, 03:16 PM   #5
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chances are its (like justin said) something in the evap system. this wont hurt the car but you will fail emissions unless its fixed.
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Old 02-19-2012, 07:01 PM   #6
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I have had Evasp codes from poor sealing caps before. Generally speaking the first thing I do is go to dealer and get another cap and try it first. The rubber seals do not last forever.
Here with air-care (emission testing stations) they also have a machine that pressure tests the cap. Not uncommon to have them fail. Try a new cap!
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