Problems and Reasons: the Ignition Coil

Administrator posted this 28 February 2019

Ignition Coil is an induction coil that converts current from a battery into the high-voltage current required by spark plugs. 


  • Ballast resistor 
  • Ignition Coil Adapter 
  • Ignition Coil Cover 
  • Ignition Coil Ground Strap 
  • Ignition Coil Lead Wire 
  • Ignition Coil Mounting Bracket 
  • Ignition Coil Mounting Grasket 
  • Perfomance Coil - Ignition 
  • Reluctor 

So, it is obvious that the Ignition Coil is responsible for timely supply of high voltage to spark plugs and capable for converting 12 Volts to 25 thousand Volts. 

The signs that can appear in case of the ignition coil been broken - are equivocal. That meanes that they might indicate a malfunction of the generator, gearbox, engine or spark plugs. Anyway, unstable operation of the engine, engine’s misfire,  flunk of rpm (revolutions per minute) at the moment when the gas pedal is sharply pressed - these are signs of malfunction of the ignition coil.  

Also in this case, the engine check signal will be active, when checking after connecting to the computer, the drop-down errors will indicate problems in the ignition system. Such diagnostics can be quickly and efficiently carried out through our application inCarDoc. 

Reasons of malfunctions in the functionality of the ignition coil are beslobbered due to its banal overheating. Often the serviceability of its work is influenced by spark plugs and other internal communication units in the car. 

If you ignore the problem of coil failure, then you can incur more serious consequences such as:  

  1. Excessive fuel consumption  
  2. Engine power loss 
  3. Fusion of the catalyst exhaust system 

There are a number of methods to test the ignition coil, one is to disconnect the connectors from each coil. The second involves removing the coil and measuring the resistance. On some cars there is a self-diagnosis function, which helps to detect a specific non-working cylinder.