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 spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la
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Acceleration Mode

ACCELERATION MODE

This is an Open Loop mode. The Powertrain Control Module (PCM) recognizes an abrupt increase in throttle position or Manifold Absolute Pressure (MAP) pressure as a demand for increased engine output and vehicle acceleration. The PCM increases injector pulse width in response to increased throttle opening.