indicate misfire in Cylinders #1, #3, and #5 respectively. on 1998 Cadillac Catera

P0300 indicates random misfire. P0301, P0303, and P0305
indicate misfire in Cylinders #1, #3, and #5 respectively.
how can we find out if the ignition coil is bad and how can we check them can any one help me please thanks

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1 answer
Have you replaced the spark plug wires yet? this is a common indication that your wires are breaking down and the ignition spark is arcing to the valve cover or engine.