What Are the Causes of Car Engine Shaking During Startup?
1 Answers
Causes of car engine shaking during startup: 1. Improper air-fuel mixture ratio; 2. Carbon buildup on valves and intake ports; 3. Low ignition energy; 4. Poor fuel quality; 5. Aging ignition coils, high-voltage wires of spark plugs, or electrical leakage; 6. Abnormal engine coolant temperature, low cylinder pressure, clogged fuel injectors, etc. Solutions: 1. Whether it's a cold start or restarting after a short stop, generally after powering off for a few minutes, turn on the ignition for 3 to 5 seconds before starting each time to allow the fuel pump to supply fuel first, let the oil pump build up pressure, and ensure all sensors receive signals before ignition; 2. If the car has been parked for more than an hour, do not start and drive immediately. Let the engine idle for 10 to 30 seconds before moving; 3. Especially after high-speed driving and suddenly entering a service area, do not turn off the engine immediately. First, open the door and exit the vehicle, then check the internal equipment of the car, and let the engine idle for 10 to 30 seconds before shutting it off.