Ignition system is used in cars that run on petrol (as opposed to diesel). The ignition systes is responsible for igniting pertrol when it enter engine cylinders at the appropriate moment to ensure effective use of petrol. In diesel engines because of diesel specification instead of ignition, fuel heating parts are used.
Most common issues in the ignition system are malfunctions or blockage in plugs, malfunctions in induction coil.
An ignition system issue can be indicated with warning lights on the car dashboard as well as incoreect engine work.