Replacing spark plugs
I am giving myself a tuneup for the first time on my 2002 pontiac grand am the problem is I dont know how to use the gapper.when and how do I use the gapper?
Measuring Tools & Sensors - Lisle - Spark Plug Gapper & Feeler Gauge
Answers & Comments
You need to gap the plug before you put in the car. When you buy the plugs ask them for the gap size for your car. On the gap tool you will see numbers that is the size of gaps. You need the gap the plug to the size they told you. You can also look at links below.
Here is a video that will show you how to gap.
http://www.ehow.com/how_2213428_gap-spark-plugs.html