Battery Management Means Knowing How It Ages
The battery may be fully charged, but you also need to measure how low the voltages go while the engine is cranking.
A Closer Look: Ignition Coils
OE coils are known for their high failure rates. Engine misfires, rough idle, a decrease in power under acceleration, poor fuel economy, and a check engine light are all signs of an ignition coil that has failed. Read along for more technical information on how to diagnose a failed coil, and why the original equipment
