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As against the current Electronic Ignition System (EIS), the Point-Type Ignition System is the older type of ignition system. They are also known as Breaker Points or Contact Point Ignition Systems. This ignition system is found inside the distributor directly under the distributor cap and rotor. The breaker point assembly has a spring loaded movable arm with a contact surface on its tip, resting the arms rubbing block on the distributor cam.

The distributor cam and rubbing block have a special lubricant to minimize wear and friction. The high and low points of the distributor cam make the arm move to open and close the points from the fixed point of the assembly. The fixed arm rests, and is firmly fixed, on the distributor body. The two contacting surfaces have different polarities and polarities will also differ on some makes of cars. When the points open, the flow of current is abruptly cut. There is a need to cut the flow of current until the next cylinder is due to fire from the spark plug. This is referred to as "timing", usually a few degrees "Before-Top-Dead-Center" (BTDC) of a piston's compression stroke. The timing of points opening and closing is critical to an engines optimal performance. These ignition systems are condenser or capacitor assisted ignition systems that momentarily store electricity when the points open. This is also relative to the collapse and build-up of current coming from the Ignition Coil. When the points close, the stored electricity or current flows back into the system maintaining the high voltage, in the vicinity of 30,000 volts, needed by the spark plugs.

Point-Type Ignition Systems were often a cause of engine misfiring, needing much attention and maintenance compared to EIS. The points could be filed to remove pits and metal transfers to either surface. Ignition Point condition is dependent on the capacitor or condenser condition which makes diagnosis or maintenance more difficult. The real defect comes from the capacitor and the points only show the symptoms. The problem with condensers or capacitors is the different microfarad ranges required in city and highway driving.

In the early days of electronic ignition system, most were still using point ignition. This means that the system has done away with the capacitor or condenser which was a frequent cause of ignition problems. With the advent of EIS point-assisted systems there was less pitting on the contact surfaces of point ignitions. As a final say on Point-Type Ignition System, if you still have a car with it, convert it from capacitor to EIS. This will save you a lot on breaker point maintenance or replacement.

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