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Injectors don't spark.

Spark plugs are what make the spark.

If you have a blinking check engine light that indicates a steady misfire. This is usually due to worn spark plugs and old spark plug wires. Replacing those is always the first place to start. Use NGK brand for both.

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Is the engine running while the check engine light is blinking or just when you turn the key on? There are test mode connectors under the dash that are not meant to be plugged together in normal operation, and if they are plugged together they make the check engine light flash.

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