What Causes the Jerking Motion During Car Acceleration?

[KalebLynn]

Reasons for jerking during car acceleration: 1. Cold engine - When the engine temperature is too low, both fuel and lubricant temperatures are insufficient, leading to poor fuel atomization and reduced ignition energy, which affects power output. 2. Carbon buildup in engine and intake manifold - The ECU makes incorrect judgments, failing to deliver required power. 3. Aging ignition system - Weak ignition energy causes ignition coils or spark plugs to misfire or experience intermittent sparks, resulting in discontinuous power output. Vehicle owners should prioritize ignition system maintenance and replacement. If spark plugs fail during operation, it can easily cause engine misfire and severely impact engine lifespan.