370z UPREV SYNCRO REV MATCH ERROR
 

Hey guys I have a 370z that was recently tuned on Uprev and whenever I use S-MODE in my car, and I try to rev-match/go into gear, it'll blip the throttle but the revs will go back and forth. Basically it is not rev-matching to the right rpm almost as if its 1500 rpms higher. The rpms will bounce back and forth, sounds like the car is trying to 2 step almost. Has anyone else experience this problem with the Sport Zs after getting flashed on UPREV????

MODS
3 Inch Upton Intakes
AAM Comp. Non Res Testpipes
ISR Y PIPE Non Res Y Pipe
Tomei Exhaust
GTR INJECTORS