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 or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Starting Mode
With the
ignition switch in the ON position, before engaging the starter, the
PCM energizes the
fuel pump relay for
2 seconds allowing the
fuel pump to build up pressure. The PCM first tests speed density, then switches to the Mass Air Flow
(MAF) sensor. The PCM also uses the Engine Coolant Temperature
(ECT), the Throttle Position
(TP), and the Manifold Absolute Pressure
(MAP) sensors to determine the proper air/fuel ratio for starting. The PCM controls the amount of fuel delivered in the starting mode by changing the pulse width of the injectors. This is done by pulsing the injectors for very short times.