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If your Buick Regal has starting running very poorly, or stopped running entirely while showing symptoms of lacking spark, your Buick Regal ignition coil is most likely the cause.
Any time the Buick Regal ignition wires exhibits physical damage either to the ignition wire or the boots, the Buick Regal spark plug wires should be replaced as preventative maintenance.
Buick Regal Copper and Platinum Spark Plugs by Bosch, Denso and NGK. Replace the Buick Regal spark plugs once a year for optimum vehicle performance and increased fuel mileage.