What Causes the Jerking Sensation When Starting a Cold Car?

[DeJoseph]

There are many reasons for car jerking: 1. Engine issues: If the car jerks while driving, the engine is definitely involved. Ignition, air intake, and fuel injectors collectively determine fuel combustion, which is also the source of the engine's power. If the air intake decreases, ignition weakens, or fuel injection reduces, the power output will be insufficient, leading to a jerking sensation. 2. Clutch problems: Many starting jerking issues occur in vehicles equipped with manual transmissions. The most common symptom is: when starting from a standstill and slowly releasing the clutch pedal, the vehicle shakes. 3. Power output and component engagement: During the break-in period of a new car, slight jerking while driving is normal because the vehicle's power output and component engagement are not yet at their best. Additionally, the transmission computer has a self-learning mechanism and needs to continuously adjust oil pressure for gear shifts.