What Are the Causes of Abnormal Noise During Car Ignition?

1 Answers
LeEmiliano
07/29/25 4:58pm
The causes of abnormal noise during car ignition are: 1. Engine belt slipping; 2. Severe wear of the starter and flywheel; 3. Failure of the valve train; 4. Excessive clearance between the hydraulic system and valves inside the engine cylinder head; 5. Timing chain failure; 6. Aging of the drive belt; 7. Three-way catalytic converter failure; 8. Engine temperature being too low. The correct method for starting a car is: 1. Insert the key and hold it in the 'lock' position for about 2 seconds; 2. Turn to the 'on' position and wait for about 5 seconds for the car computer to perform a self-check; 3. Turn the key to the 'start' position to ignite, and release the key after starting; 4. Warm up the car in place for about 30 to 60 seconds; 5. Press the brake, shift to 'D' gear, then release the handbrake and foot brake to start moving.
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