Toyota 4A-GE Engine: How to set Ignition Timing (AE86)

It is very easy to set the ignition timing on your AE86 (or any other car equipped with a 4A-GE of the same age). Here is a guide / tutorial to help you set it right, save the environment, get more power and less gasoline smell in the exhaust. Specs: 10º on diagnostics mode, 16º on normal mode.