What Causes Jerking When Starting a Sedan?

[McKeegan]

The main reason for jerking when starting a sedan is a clogged engine oil passage. Here are the relevant explanations: 1. Clogged engine oil passage: If the car experiences jerking while driving, it is somewhat related to the engine. The engine's ignition, air intake, and fuel injectors collectively determine fuel combustion, which is also the source of the engine's power. If the air intake volume decreases, ignition weakens, or less fuel is injected, the power will be insufficient, resulting in a jerking sensation. 2. Normal phenomenon: Jerking when starting an automatic transmission car is normal. If you want to accelerate sharply while driving, you need to press the accelerator deeply. At this time, the automatic transmission will automatically downshift to increase the engine speed. When the speed reaches a certain level, it will upshift. After upshifting, because the speed will drop significantly, a relatively obvious jerking sensation will occur.