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What does it mean when a car backfires after having the oil and filter changed?
Wiki User
∙ 12y ago
It means that it has absolutely nothing to do with the oil and filter change. Backfiring is caused by unburned fuel/incomplete combustion/carbon buildup/incorrect ignition timing. The unburned fuel vapors pass into the hot exhaust and ignite just before the 1200 degree catalytic converter causing the backfire.
However, ensure that you always check the oil level after having your oil changed by a third party.
Wiki User
∙ 12y ago
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