What is torque management for an A4?

I have heard that my car has it and M6's don't.

What is it? What does it do?

I am getting a Predator next week....James said it will get rid of it, will that make a difference to me?

Thanks

 

From my 2002 service manual:
Torque Management (TM) is a function of the PCM that reduces engine power under certain conditions. TM is performed for the following reasons:

1. To prevent overstress of the powertrain components.
2. To reduce engine power during certain throttle actuator control (TAC) system faults.
3. To limit the engine power when the brakes are applied more than approximately 40%.
4. To prevent damage to the vehicle during certain abusive maneuvers.

The PCM monitors the following sensors and engine parameters to calculate engine output torque.

- Air/Fuel ratio
- Mass Air Flow (MAF)
- Manifold Absolute Pressure (MAP)
- Intake Air Temperature (IAT)
- Spark Advance
- Engine Speed
- Engine Coolant Temperature (ECT)
- A/C Clutch Status

The PCM monitors the torque converter status, the transmission gear ratio, and the extended brake switch input 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 maneuver.

The following are instances when engine power reduction is likely to be expected:

- During transmission upshifts and downshifts
- Heavy acceleration from a standing start
- The brakes are applied with moderate to heavy throttle (with the traction system active).
- When 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 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. The PCM disables the fuel injectors for cylinders 1, 4, 6, and 7, in case of an abusive maneuver.

 

Al, that was a very good description of Torque Management! :yesnod: Thanks!! :)

vetterdstr :cheers:

 

Do all A4 C5's have Torque Management or some form of it?

 

Yes, but the algorithms were changed in '03 due to the use of the 4L65E trans. Helps to reduce warranty costs, and having the car go into the Tennis Shoe Mode. :lolg:

 

Yes they do! :smash:

vetterdstr :cheers:

 

By changing my shift points and line pressure with a Predator, have I removed the TM system from operation?

Thanx,
Jeremy

 

My understanding is that you can raise the level of Tq managment with the LS1 edit program to the point that it will kick in at a later point or not at all... The only problem with that is... GM does not have to honor warranty issues due to drivetrain failures.

vetterdstr :cheers:

 

The Predator did a good job of getting rid of it (or at least to a point where I can't notice it.) Also, you can always reinstall the stock programming before going to the dealer. :cheers:

 

That managment program is also tied into the Active handling programs.. if you get into a wreck with it disabled to where the AH is not kicking in... it can bring a whole new set of problems for your warranty or insurance coverage too.

Any time you start messing with the computer, it brings benefits as well as potential problems (in certain situations) too.

But what the heck do I know... :p:

vetterdstr :cheers:

 

The LS1Edit has the ability to disable torque management, go to the webb site ( ls1edit@slowcar.com) This will explain how it is done, look under the page FAQ. There is alot of information on that webb site, it helped me get a lot of facts to back up alot of opinions. Hope this helps. :cheers:

 

:lurk: :lurk: :lurk: Great explanation Toomany...