2010 Camaro Over de-acceleration

[05Bluevette]

I am having a problem with a 2010 Camaro automatic with a L99. Problem is while trying to maintain a certain speed. RPM wants to clime, so to maintain speed, a very slight De-acceleration causes the car to act like the throttle is shut, and it pulls out 20 degrees of timing.I posted a log and it is easiest to view the problem at frame 1519. Does anyone have any ideas?

[C5turbo]

Maybe that's caused by a 'weak' MAF. The weak ones act sort of 'sticky' like that.
http://www.vararam.com/camaro.html

[05Bluevette]

interesting read,i'm going to check on that.thanks!

[Higgs Boson]

is the vehicle modified? post your tune.

[05Bluevette]

it has a kenne bell supercharger kit with a tune from them,zl1 fuel pump and cat back exhaust.
fuel pressure remains constant, so does the wide band reading-untill slight decel.