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