Question about 1999 Volvo S80
The misfire causes unburnt fuel and air to pass by the oxygen sensor. The sensor sees the oxygen and thinks more fuel is needed, so it adds gas. Focus on the misfire, bad spark plug, ignition coil, plug wire. A clogged fuel injector also causes a misfire but less common.
Posted on Apr 12, 2014
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Posted on Jan 02, 2017
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