09 reg Chevrolet Tahoe vortex with STS turbo conversion problem.

[Auto1]

Hello, Greetings from Norway.
I have a 2009 reg Chevrolet Tahoe With the vortex engine.
It has installed a STS turbo Conversion kit on it, and it has runned good for a couple of years. But earlier a problem occured, when you drive and give a throttle more than about 70% it cuts the Power. it generates a fault code on the predator diagnostic on mixture to Rich and the MAF sensor. I have tried to change the MAF sensor to no sucsess. If you disconnect the MAF sensor it drives like it should With an abundance of Power. So in my head that makes a Electric problem not a mechanical problem.
Anyone in here that can help me With this problem?
Thank you and sorry for my bad Third Language English.

 

[bladenbullet]

is the vehicle still equipped with a manifold air pressure sensor and have you checked the readings to determine if it could be a problem....there are a lot of concerns that can lead to maf perceived concerns....i am not familiar with the sts turbo upgrades ro what is cheanged but it would be a direction i would be looking in....especuially with an engine running boost....

 

[Auto1]

Thank you for the tip. it still has the original. i tried to change it, and it had no effect.