NGK RESISTOR SPARK PLUG: IDEAL FOR ALL VEHICLES

Constant technological progress increasingly requires the incorporation of onboard electronics on modern vehicles, whether in the engine or in comfort and convenience equipment. Microprocessors - actual computers with surprisingly high power - have sophisticated characteristics. They are very sensitive to radio frequency interference which can cause failures in their operation and disturbances in the various systems controlled by the microprocessor.

On vehicles equipped with an Otto cycle engine, the ignition system is one of the main sources of radio-frequency interference. To limit these effects, NGK developed resistor spark plugs which had such attractive qualities that they became original equipment on all domestic vehicles. That is why it is essential to always use resistor plugs when performing maintenance.

The chief construction characteristic of these plugs is a 5kohms resistor inserted into the central electrode, thus forming a unit which follows all the thermal and mechanical demands of a high quality spark plug. The biggest advantage is the reduction of electromagnetic interference to a minimum level. Use of these plugs allows:

•Better audio reception on AM-FM radios
•Attenuation of interference to allow proper ignition, etc.
•Better operation of radio communications
• Minimum interference in electronic taxi ignition systems

NGK resistant plugs are identified by the letter R stamped on the ceramic insulator and on the cardboard cartons. Their code in catalogs is also marked by the R. This will help in identifying the correct type of plug when it comes time to change your plugs.

For more information, NGK has a toll-free service number: 55-11-0800-197-112. .