What is the reason for the difficulty in starting a car?

The reasons for the difficulty in automobile ignition are as follows:

1, the ignition energy of the spark plug is weak. If the spark plug is not replaced after the maintenance period, the ignition energy of the spark plug will drop seriously;

2, car carbon deposit, accompanied by slight jitter when idling, just clean the throttle, intake carbon deposit and fuel nozzle;

3, the battery is dead, just find a car or battery can be charged.