Operation CHARM: Car repair manuals for everyone.
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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Acceleration (Except Wide Open Throttle)



This is a CLOSED LOOP mode.

- The PCM recognizes an abrupt increase in throttle position or MAP pressure, as a demand for increased engine output to accelerate vehicle.

- The PCM increases injector pulse width, in response to increased fuel demand.