From somewhere, credit to whoever.
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With the GEN III VS engine, Torque Management is a function of the PCM that reduces engine power under certain conditions, included in which, is the transmission upshifts and downshifts.
Torque Management is performed for the following reasons:
1. To prevent overstress of the powertrain components.
2. To prevent damage to the vehicle during certain abusive maneuvers.
3. To reduce engine speed when the IAC is out of the normal operating range.
The PCM monitors the following sensors and engine parameters to calculate engine output torque;
- Air/Fuel ratio
- Mass Air Flow
- Manifold Absolute Pressure
- Intake Air Temperature
- Spark Advance
- Engine Speed
- Engine Coolant Temperature
- A/C Clutch Status
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 to reduce engine torque output if torque reduction is required. The PCM. also shuts off the fuel to certain injectors to reduce the engine power In the case of an abusive manoeuvres.
Instances when engine power reduction is likely to be experienced, are:
a. During transmission upshifts and downshifts.
b. Heavy acceleration from a standing start
c. The IAC is out of the normal operating range.
d. When the driver is performing stress-inducing (abusive) maneuvers such as shifting into gear at high throttle angles or shifting the transmission from reverse to drive to create, a rocking motion. The driver is unlikely to notice the torque management actions in the first two instances.
The engine power output will be moderate at full throttle in the other two cases. The PCM calculates the amount of spark retard necessary to reduce the engine power by the desired amount. For example the PCM disables the fuel injectors for cylinders 1, 4, 6, and 7 in the case of an abusive maneuvers.
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This is the issue, it has been getting worse since '98, more and more conservative. The only cure is to "fix the chip".
The more mods you do, the more this becomes a daemon on your shoulder [or butt]
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With the GEN III VS engine, Torque Management is a function of the PCM that reduces engine power under certain conditions, included in which, is the transmission upshifts and downshifts.
Torque Management is performed for the following reasons:
1. To prevent overstress of the powertrain components.
2. To prevent damage to the vehicle during certain abusive maneuvers.
3. To reduce engine speed when the IAC is out of the normal operating range.
The PCM monitors the following sensors and engine parameters to calculate engine output torque;
- Air/Fuel ratio
- Mass Air Flow
- Manifold Absolute Pressure
- Intake Air Temperature
- Spark Advance
- Engine Speed
- Engine Coolant Temperature
- A/C Clutch Status
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 to reduce engine torque output if torque reduction is required. The PCM. also shuts off the fuel to certain injectors to reduce the engine power In the case of an abusive manoeuvres.
Instances when engine power reduction is likely to be experienced, are:
a. During transmission upshifts and downshifts.
b. Heavy acceleration from a standing start
c. The IAC is out of the normal operating range.
d. When the driver is performing stress-inducing (abusive) maneuvers such as shifting into gear at high throttle angles or shifting the transmission from reverse to drive to create, a rocking motion. The driver is unlikely to notice the torque management actions in the first two instances.
The engine power output will be moderate at full throttle in the other two cases. The PCM calculates the amount of spark retard necessary to reduce the engine power by the desired amount. For example the PCM disables the fuel injectors for cylinders 1, 4, 6, and 7 in the case of an abusive maneuvers.
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This is the issue, it has been getting worse since '98, more and more conservative. The only cure is to "fix the chip".
The more mods you do, the more this becomes a daemon on your shoulder [or butt]
and I found my way to torque managment ...my 1500 z 71 av has a button tow mode and it seems that it holds and shifts much more responsibly and another thing-- i wound it all the way up in 4 wheel low and it would go like 80mph... how low is low ..my old k-5s in low 4 wheel felt like the were geared down much more than the av is. I also feel the backlash clunk at low speed upshifts and hear at about 10-15 mph the tranny drop in to low coming up to red lights
What I miss out of my 97 f-150 sc long bed was it's passion for two wheel black marks going fwd. I have the same 600 lb load in my av with twice the power and blaaaaaaaa.