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Message: <blockquote data-quote="michael" data-source="post: 2626919" data-attributes="member: 207008">The blinking check engine light means you have a serious misfire. Low speeds are not a big problem when the light blinks, but freeway driving can melt the catalyst in the converter in as little as 12 seconds when ignition is causing the misfire. Your 11 year old converter was probably okay before the blinking, but it is questionable now.You need to know what cylinder is causing the misfire indication, and Auto Zone can do that for you. There will be a code of P030x, where x is between 1 and 4 and is the cylinder number at fault. Replacing the spark plugs is a good place to begin (actually, you don't need to know which cylinder is involved to do that). If the plugs don't make the light stop flashing and make the car run normally, you will get into the injectors. That is more complicated.</blockquote>