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Ok I have put coil packs on my 2006 chevy impala but the engine light is still on wat do i do now.

Vehicle: 2006 Chevrolet impala Ltd500c6W6ET

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HI there,

Check for an intake manifold gasket leak, swap the #3 fuel injector with the one next to it and see if the misfire code moves to the new cylinder.

Take a compression test on cylinder #3

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