What Causes the Car Body to Still Shake After Replacing Spark Plugs?

[VonEvelyn]

Generally, the following issues may cause this: Damaging or partially breaking the ignition wires when removing the spark plugs, resulting in abnormal ignition; Incorrect installation of spark plugs, such as not tightening them properly (threads not aligned) or ignition wires not fully inserted; Ignition wires not corresponding to the correct cylinders. Symptoms of Damaged Spark Plugs in a Car: Damaged spark plugs may lead to the following issues: difficulty starting the engine, reduced power, excessive exhaust emissions, and increased fuel consumption. Effects of Damaged Spark Plugs: If spark plugs are damaged, it can directly cause problems such as leakage in the vehicle's ignition system, increased fuel consumption, and decreased power. The most significant issue is difficulty in ignition, affecting the normal operation of the vehicle. Severe erosion of spark plugs, such as scarring at the top, damage, or melted electrodes, indicates that the spark plugs are ruined and should be replaced.