How do you determine which coil pack is bad on a 2001 Acura CL?

To determine which coil pack is bad on a 2001 Acura CL, you can start by checking for trouble codes using an OBD-II scanner; a misfire code will often indicate a specific cylinder. Next, inspect the coil packs visually for any signs of damage or wear. You can also perform a swap test by moving the suspected coil pack to another cylinder and checking for a change in misfire; if the misfire follows the coil pack, it's likely the faulty one. Finally, use a multimeter to measure the resistance of the coil; if it’s outside the manufacturer’s specifications, it may need replacement.