There are several signs that can indicate that the ignition coils on your Harley-Davidson motorcycle may be faulty or bad. Here are some common symptoms:
Engine misfires: If you experience frequent misfires or hesitation during acceleration, it could be a sign of a faulty ignition coil. The misfire can occur in one or multiple cylinders.
Difficulty starting: A malfunctioning ignition coil can make it difficult for the engine to start. You may experience extended cranking or the engine may fail to start altogether.
Weak or inconsistent spark: A weak or inconsistent spark from the spark plugs can indicate a problem with the ignition coils. This can result in reduced engine performance, rough idling, or stalling.
Backfiring: If you hear backfiring or popping sounds from the exhaust, particularly during deceleration, it could be a sign of faulty ignition coils.
Decreased fuel efficiency: Faulty ignition coils can lead to inefficient combustion, resulting in decreased fuel efficiency and potentially higher fuel consumption.
If you suspect that your Harley-Davidson's ignition coils are bad, it is recommended to have a professional motorcycle technician diagnose the issue. They can perform tests, such as measuring the resistance or conducting a spark test, to determine if the coils are functioning properly. Proper diagnosis will ensure that the issue is correctly identified and addressed.