There are many different types of ignition systems. Most of these systems can be placed into one of three distinct groups:
2. the electronic ignition systems (popular since the mid 70s);
3. the distributorless ignition system (introduced in the mid 80s).
The automotive ignition system has two basic functions:
a) it must control the spark and timing of the spark plug firing to match varying engine requirements,
b) it must increase battery voltage to a point where it will overcome the resistance offered by the spark plug gap and fire the plug.
The ignition system provides a spark between the spark plug electrodes. The spark must occur at precisely the right time in the engine cycle, and it must have sufficient energy to bridge the gap and ignite the air-fuel mixture under all operating conditions.
A basic ignition system consists of:
-the battery
-low-tension cables
-the ignition coil
-distributor
-coil high-tension cable
-spark plug cables
-and spark plugs
Older systems used a points-and-condenser system in the distributor, newer (as in most we'll ever see anymore) use an ECU, a little brain in a box, to control the spark and make slight changes in ignition timing.
Electronic ignitions, of course, do not need distributor maintenance as often as conventional point-type systems; however, nothing lasts forever. The distributor cap, rotor and ignition wires should be replaced at the manufacturer's suggested interval. Also, because of the higher voltages delivered, spark plugs should last anywhere from 30,000-60,000 miles (48000-96500 Km).
How ignition system works - useful link!
You can buy standard and aftermarket ECUs, distributors, cables, wires, and many other spare parts for your car with TrueJDM
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