My car is a 2007 g35 coupe MT with a custom single turbo running about 8 psi and i have the tuner version of Uprev running 11.3-11.8 AFR through the pull and a maximum timing of 14* by redline but when i shift quickly the computer retards the timing -2 to -8 degrees for a second or two before resuming normal timing. I did a few logs and it is not going into high det mode (checked the log and also changed the Hi det table to match the main ign table no help) any one have any idea what could be causing this