Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
If it fails:
lemon-manuals.org.ua
Or, hide this message:
temporarily or
permanently
Ignition Timing: Description and Operation
Ignition Timing ControlThe ECM/PCM contains the memory for basic
ignition timing at various engine speeds and manifold absolute pressures. It also adjusts the timing according to engine coolant temperature and intake air temperature.