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Ignition coil typical failures and inspection methods
Publication date:2017/9/9 11:05:44 Browse times:618


The life of an Ignition Coil depends largely on the environment in the engine room and the condition of the other secondary system parts and how it is treated in the maintenance .Failures occur when the coil becomes old and the insulation becomes deteriorated. The following troubles appear concerning the Ignition Coil :

● The engine speed does not increase or takes a breath in an acceleration.

● The idling condition becomes unstable or the engine stalls,or

● The engine becomes difficult to start while the battery and the starter motor are in normal condition.

As an inspection method the resistance between the terminals of the Ignition Coil is measured ,to check the disconnection or short circuit of the coil .

Since the inspection method of the Ignition Coil depends on the maker of the vehicle,check the maintenance manual of the vehicle .If the failure occurs intermittently or it does not improve ,it is recommended to replace the Ignition Coil .




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