Firebird V8-5.7L VIN G (2001)
The PCM monitors the torque converter status, the transmission gear ratio, and the engine speed in order to determine if torque reduction is required.
The PCM retards the spark as appropriate, in order to reduce the engine torque output if torque reduction is required. The PCM also shuts off the fuel to
certain injectors in order to reduce the engine power in the instance of an abusive maneuver.
The following are instances when an engine power reduction is likely to be experienced:
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During transmission upshifts and downshifts
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During heavy acceleration from a standing start
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If the IAC is out of the normal operating range
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If the driver is performing harsh or abusive maneuvers, such as shifting into gear at high throttle angles or shifting the transmission from reverse to
drive in order to create a rocking motion.
The driver is unlikely to notice the torque management actions in the first 2 instances. The engine power output will be moderate at full throttle in the
other 2 instances.
The PCM calculates the amount of spark retard that is necessary to reduce the engine power by the desired amount. The PCM disables the fuel injectors
for cylinders 1 4, 6, and 7 if an abusive maneuver occurs.
