✔ Why Use Resistor Spark Plugs

Why Use Resistor Spark Plugs

- September 06, 2019

Ngk r or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking. I do have petronix pointless ignition though.

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The intention of these two items was to reduce emi electro mechanical interference or rfi radio frequency interference.

Why use resistor spark plugs. Ngk strongly recommends using resistor spark plugs in any vehicle that uses on board computer systems to monitor or control engine performance. But not all spark plug manufacturers include this designation so looking at the current plug does not always help. Resistor plugs help suppress spark plug noise a valuable trait under certain circumstances.

Using a non resistor spark plug on a system designed for resistor plugs will weaken your spark and therefore negatively affect power output of the engine. Our coils and ignition amplifiers are designed around that total resistant. Because of this a spark plug cap with a 1000 ohm resistor built inside was used along with a sheet metal type shield on the outside of the cap.

My 69 tr6 has none of that. A resistor is exactly what the word implies. And i dont plan on installing a stereo.

When the spark crosses the point of resistance some of the spark energy is lost. They will turn on their panel indicator lights wiggle their gauges around and do other strange things if connectivity to the resistors is faulty or if non resistor spark plugs are installed in them. These vehicles have resistor spark plug caps to protect their instrumentation as well.

Non resistor spark plugs deliver a more powerful spark. The resistance of the plug and that of the electrode gap add onto each other. I know resistor spark plugs are used with cars that have electronic computers stereos etc.

A resistor is like an electronic obstacle and could be the cause for a weak spark. When should i use a resistor spark plug. Sometimes a resistor is installed in spark plug wire as a supressor to reduce radio static interference.

I was thinking about replacing the spark plugs with the factory recommended champion 12y non resistor. If you are looking for performance you want to use non resistor spark plugs. Resistor type spark plugs typically include an r in the part number for ease of identification.

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