What Causes Intermittent Misfiring?
1 Answers
Intermittent engine misfiring is primarily caused by faults in the fuel supply, ignition, and intake systems. An engine can only run smoothly when these three factors are met, so misfiring indicates a problem in one of these systems. Below is a detailed explanation of the causes of intermittent misfiring: 1. Ignition system failure: Aging of ignition coils and spark plugs can cause the ignition system of a cylinder to malfunction. Problems with the ignition coil most commonly lead to reduced power and, in severe cases, sudden engine stalling. 2. Fuel injection system failure: Clogged fuel injectors or fuel lines can prevent sufficient fuel from being supplied to the cylinder for combustion, naturally causing the cylinder to fail to operate properly. 3. Excessive spark plug carbon buildup: Long-term poor combustion leads to carbon deposits accumulating on the spark plug ignition point. When these deposits are wetted by fuel, they create a parallel shunt resistance, resulting in spark plug leakage, weak sparking, or even complete spark plug failure.