Go to[chignitions.com] and download the degree and instructions.
After everything is setup,you use the degree wheel with the plug installed in the boot,not the engine.
Then make sure the plug is grounded to the engine,then hook up your battery.
Then using a pointer,the degree wheel,you turn the engine over and notice at what degrees the spark plug fires.
First thing to do is go to chignitions website and look there.
Once yo read the directions,ect,youll have that AaaaaHAaa. moment.