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Tune or traction control or??? Car cuts timing after a fast shift
I have a 2006 C6Z06 with heads cam, intake, exhaust.
Only when I have very good traction and shift from 1st to 2nd, 2nd to 3rz and 3rd to 4th the car loses 12-16degs of timing for a random amount of time then suddenly snaps back to full timing and feels like a 100shot of hp kicking in.
If I have street tires on the car spins and literally doesn't take a single degree of timing out.
I've logged the car it shows no knock retard, coolant temp is typically in between 180-190degs, its only after a shift. Never happens in 1st gear.
Traction control turned off, complete traction control turned off.
The throttle position is not commanded shut when this happens and stays and a constant 88.0% wot during issue. Not flat shifting the car but the faster the shift the worse it is. It'll do it for a duration of 100rpm or a duration of 800rpm before it kicks in.
Thoughts on the issue and things to try.
Car already has a replacement PCM and did it with both.
How could I tell if it's torque management doing it?
Do you have access to the tune? If you do in HPT, try:
Engine > Torque Management > General > TS Control System. All the way down to the bottom of that column. Disable Powerhop. Try that. If it doesn't correct it, then I'd re-enable powerhop.
Do you have access to the tune? If you do in HPT, try:
Engine > Torque Management > General > TS Control System. All the way down to the bottom of that column. Disable Powerhop. Try that. If it doesn't correct it, then I'd re-enable powerhop.
It is officially TORQUE MANAGEMENT taking out the timing.
It shows up under "TORQUE MANAGEMENT ADVANCE" it'll remove 12-16degrees of timing after each shift and wont return till top of that gear and happen again in the next.
From everything I can see i have the torque limits to 6042 and nothing that shows in the tune that torque management is even able to come into play.
It leaves me with.... WHAT enables torque management? What parameters is it using to determine taking away timing? Is there something like speed sensors, remove a fuse anything so it cant access a parameter to take it away?????
I don't see anything that jumps out in those screenshots other than the spark tcs type enabled, but I doubt that's the issue. Try logging "Spark Torque Management Type"
I guess your OS doesn't have Fast Torque Exit available. I know Dave Steck sells some 2010+ ecus that fix a ton of little issues like this because of available code updates, but I'm not sure if this would be one of them.
Ok I went back out today, Oil starve disabled, supercharger torque mngmt disabled, spark tcs disabled. The car still managed to pull 15-13 deg's of timing for a LONNNNG time in 2nd and a blip in 3rd till i let out. I go into ETC torque limiting and the table is set to "0's" for the amount of timing it can pull. What else can i log to help find this? I'm about to burn the car to the ground!!!!!!!!!!
10-21-2017, 06:43 PM
Tune or traction control or??? Car cuts timing after a fast shift
