this is how you test the coil pack.
With the ignition off, disconnect the 4 wire connector from the coil. connect an ohmmeter between pin 4 on the coil connector (the pin that connects to the white/blue wire) and each of the other three pins in sequence. The primary resistence should read 0.5 ohm and the secondary resistence should read 13,600 ohms. If resistance is out of limits for any of the individual coils. The complete coil pack should be replace.