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What is the reason for a car having fuel, spark, and cylinder pressure but not starting without any faults?

1 Answers

SanTimothy

07/30/25 3:26am

This situation may be caused by damage to the ignition system. After encountering this issue, it is recommended to check the ignition coils and spark plugs. The operation of a car engine depends on the ignition system. If the ignition system fails to spark, the combustible mixture in the cylinder cannot ignite. Relevant details are as follows: 1. Spark plugs: The ignition coil and spark plug are the main components of the ignition system. The spark plug is a wearable part that requires regular replacement. The spark plug has electrodes that can release sparks. However, as usage time increases, the electrode gap of the spark plug will gradually widen, leading to weaker ignition energy. If the ignition energy weakens, it will affect the engine's power and fuel consumption. 2. Ignition coil: If the spark plug is not replaced for a long time, the electrodes of the spark plug may fail to release sparks. The ignition coil is used to connect the spark plug, and its function is to increase the voltage. Only with sufficiently high voltage can the spark plug release sparks.

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