'10 Camaro L99 E38 ECM Throttle Closing during shift

Has anyone experienced this problem?

As soon as the car shifts, the throttle goes from ~84% to about 42% for a duration of about 0.4 seconds in the 1-2 shift, then OCCASIONALLY does this for a shorter amount of time in the 2-3 shift.

Overrev RPM set at 6800, shift RPM set at 6400~6500 (I have tried 6000 and 6300 too). This did not occur with the original OEM tune, but as we are increasing the HP/TQ the problems seems to get worse.

The TQ limits in each gear is set to 1000 lb. ft.. The engine is showing about 325ish.

Any assistance that you can offer will be greatly appreciated.


https://imgur.com/6c5qLoA

Check the setting of B0517. Try setting it to no.

Quote:

---

Originally Posted by izaks

Check the setting of B0517. Try setting it to no.

---

Thanks for your response. I have the TQ reduction set to "by spark option" with all other settings indicated with "no".

Any other suggestions?


https://imgur.com/hP8D4Er

Only thing I can think of is Traction Control ?

Quote:

---

Originally Posted by izaks

Only thing I can think of is Traction Control ?

---

As far as I know, I have all the TQ limits for traction control set very high. There is a chance I might be missing something in one of the settings, but I don't quite know where else to look.

Post up the trans and engine file. So I can compare it to what I do to those.