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1993 Subaru Loyale Question: Engine Pinging

 

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V1rotatev2, Anderson, IN, June 04, 2010, 15:44
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Frequent/extreme engine pinging during acceleration; recent cross-country trip suggests rich fuel/air mixture because the pinging went away at higher altitudes (pinging gone above 6000 feet). Should I just replace the O2 sensor? Or could it also be the injectors or ECM?

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