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2002 Infiniti I35 Question: random misfire codes after changing spark plugs. CAR RUNNING VERY ROUGH

 

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rlcg, Seminole, FL, July 09, 2012, 20:16
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had my sparkplugs changed and was told oil was found in one. had both gaskets replaced and now my car is running HORRIBLE!!!It is sputtering and i am getting only 10 mpg engine codes are P0300, P0223,P1224, P1122. in addition, both the check engine and airbag lights are blinking.

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