That's not good for LTFTs. It sounds like you have a vacuum leak somewhere, and not a small one.

 

Thank you all of you guys for supporting me finding the cause of this problem!
Is it possible that the crankshaft seal in the front cover goes wrong, and there is that crazy vacuum leak? One week before the tensioner problem, I had to take down the crankshaft pulley, maybe something happened with the crankshaft seal.
Anyway I used the car without any problem for a week after the pulley thing, still the tensioner problem happened

Vacuum test: Maybe there is a little rpm jumping when I spray around the intake pipe where it connects to the throttle body, but I don't know really, because the idle is not stable. That is not a tight connection with that big rubber ring around on the intake pipe at the throttle body.

Newest driving experiences: now at longer (time) decceleration there is restricted performance message, but at acceleration it goes away.

 

The problem is a huge leak between MAFS and TB.
Something like a split hose.

 

OK, I will check again the intake pipe tomorrow. I would be so happy finding a split.

 

I still can't believe, but the problem is SOLVED!!!

The LH cylinder Bank's head cover breathing tube took apart, hidden under/behind the LH intercooler. Somebody, before I've got the car cured this long plastic factory tube with a short rubber hose, but now the plastic tube came out of the rubber hose. Maybe it happened when I took off the breathing pipe from the head's cover and pulled the tube a little. So there were a fully opened vacuum tube, that causes the unstable idle, and the lot of faults code. Now I repaired the tube with another rubber hose, but I will order a new factory one.
Thank you for your help! This forum is just like a virtual service shop!

 

Glad to hear it.
Most faults can be fixed with a logical approach.

 

Ive developed the same issue after replacing my chains , im in the process of double checking the timing and when i wound the cam lock bar down on one bank they were a nats cook out should i slacken off the pullys to let the slack out ?