October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Ignition Timing: Description and Operation
The ignition power transistor located in the ignition primary circuit turns
ON and OFF to control the primary current flow to the ignition coil This controls the
ignition timing in order to provide the optimum ignition timing with respect to the engine operating conditions. The ignition timing is determined by the ECM from the engine speed, intake air volume, engine coolant temperature and atmospheric pressure.