Ignition / Spark / Coil
- Created: Friday, 13 January 2017 17:44
- Written by Mr. Car Guy
Does your vehicle’s engine die abruptly after driving around Costa Mesa for a while? Does your car ever have trouble starting? Does it stall, misfire, backfire, or get worse gas mileage than it used to? If you’ve noticed any or all of these symptoms, you may have a failing ignition coil or coil pack. (Unless you drive a diesel - diesel engines do not need an ignition system, since they rely on compression to ignite the air/fuel mixture.)
Your vehicle’s ignition coil, also known as a spark coil, is an induction coil in your car’s ignition system which transforms the battery’s low voltage into thousands of volts which are needed to create an electric spark in the spark plugs to ignite the fuel. Ignition coils can have either an internal resistor or an external resistor or resistor wire, which serves the purpose of limiting the current flowing into the coil from the car’s battery. They also have another high voltage wire which goes from the ignition coil to the distributor, and wires from the distributor to each of the spark plugs, called spark plug wires or high tension leads. Most ignition coil systems today use a power transistor to provide pulses to the ignition coil.