The gap between the center and side electrodes of a spark plug must be an exact distance; otherwise, your plugs don’t fire efficiently. Adjusting the distance between the two electrodes is called gapping your spark plugs. You need a feeler gauge to gap your spark plugs properly.
What is the importance of a spark plug tester?
An ignition spark tester is a tool you can use to determine if an electrical current is reaching the spark plug in your engine. That current is used to detonate the air and fuel mixture inside the engine’s cylinder to create power.
What is a spark plug feeler gauge?
A feeler gauge is made up of thin metal blades of different thicknesses joined together like the blades of a pocket knife. Depending on the feeler gauge you get, some have wire loops and a bending hook designed especially for gapping spark plugs. …
Is a spark plug gap tool necessary?
If you snap off the bottom electrode or damage the center electrode from excessively prying on it, you’ll need a new spark plug. Precious metal iridium or platinum center electrodes can be very delicate when it comes to prying them. It is important to use the proper spark plug gapping tool.
What does a larger spark plug gap do?
The larger the gap, the more voltage is needed to jump the gap. Most experienced tuners know that increasing the gap size increases the spark area exposed to the air-fuel mixture, which maximizes burn efficiency. For this reason, most racers add high-energy ignition systems.
Do I need a feeler gauge?
A feeler gauge is a hand-held tool used for measuring gap widths between two objects that are close together. They are extremely popular with mechanical engineers as they require a very accurate clearance description between two parts where a caliper or tape measure would not be able to fit.
What if the spark plug is gapped to much?
Spark plug gap: definition and use guide Influence of large spark plug gap. Influence of spark plug gap too small. Reasons for adjusting spark plug gap. Spark plug gap is normal but not ignition. Adjustment method of spark plug gap. New spark plug gap. Spark plug ignition process. Influence of spark plug gap on engine condition. Selection of spark plug gap. Expression of spark plug gap.
What happens if your spark plug gap is too big?
What happens if a spark plug gap is too big? An engine that hesitates, or stumbles, upon acceleration is often the result of incorrectly gapped spark plugs. If spark plugs are gapped too wide, the ignition spark loses some of its strength as it crosses the spark plug gaps. This can result in engine hesitation.
What do use to measure a spark plug gap?
The next step is to measure the spark plug gap. Do this by inserting the gauge between the center wire and side terminal or ground electrode. If the tool does not touch the electrodes at the appropriate measurement, the gap is too large. Likewise, if the tool doesn’t fit between the electrodes the gap is too small.
How much should I gap spark plugs?
Racing Plugs 0.016″ 0.4mm
