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

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Acceleration (Except Wide Open Throttle)

Note: For Wide Open Throttle (WOT) operation, SEE OPEN LOOP MODES OF OPERATION.

PCM INPUT:

Powertrain Control Module (PCM) recognizes an abrupt increase in throttle opening, (TPS voltage increase), or drop in engine vacuum, (MAP sensor voltage increase), as a demand for increased engine output to accelerate vehicle.

PCM OUTPUT:

PCM increases injector pulse width to accommodate increased fuel demand.