A spark plug gap is the distance between the spark plug tips, for a more reliable gap setting follow your vehicle model service manual for specific gap sizes.
It depends on the brand of spark plug being used, could be anywhere between .030" to .044".
for me .032"/.034" gets the best results, although some people get good results at .030".
You need to experiment a little & see what works with best with your vehicle.
If you're replacing the spark plugs in your car
engine, you'll need to set the gap before reseating the
spark plug. The gap is the distance electricity arcs between the ground
electrode and center electrode. The gap must be set correctly to ensure
maximum performance. Here's how to set the gap of a spark plug.
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