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Depends on model and fuel system. It could be as simple as a dirty air filter, the O2 sensor can be tired, it could have a leaky injector, the fuel pressure regulator could be leaking, the fuel return line could be plugged, the coolant temp sensor could be bad, or any number of other problems.

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โˆ™ 2007-07-28 05:51:28
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Q: Why will an 89 Volvo run rich?
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