Something is wrong with no warning lights, please help

[papertowel]

I currently have a 2013 regal turbo and for a while now i have had a tune on it (about a year) but recently the car feels noticeably slower and I cant figure out where the power loss is coming from or what is wrong. I am suspicious it may have something to do with the transmission but I am unsure. If anyone has some insight i can provide information but I am completely at a loss currently

 

[HotZ28]

I assume you have not got any trans codes, or pending engine codes? The turbo may be failing but you need to look @ a capable scanner to see what the problem is. All we can do here is speculate.

 

[papertowel]

I assume you have not got any trans codes, or pending engine codes? The turbo may be failing but you need to look @ a capable scanner to see what the problem is. All we can do here is speculate.

Yes, zero codes at all and I have a code reader that I would assume is capable.

 

[atomicbee]

yes your reader should catch some sort of LOP code, I would start by checking the battery voltage/connections reload your Tune (ZZP HP?) and see if that wakes up your Regal

 

[papertowel]

Im suspicious that its something with the torque converter or the trans. The first thing I did was reload my tune and I couldn't really tell if ut changed anything. I also reset the electronics in the car by disconnecting the battery for a while. But ive hooked up my scanner which can read and record live data several times and everything with the engine itself appears to be running correctly. Both 02 sensors look good, the maf appears to be reading what it should be, the fuel pump and HPFP all seem to keep up (though i have gotten codes in the past), it doesnt appear to be pulling timing but I dont really know how much timing there should be at say full throttle. The spark plugs look good and they where replaced not that long ago and the turbo seems to be making the correct amount of boost as well. Recently I changed my transmission fluid because the car began shifting like crap over the summer and it was definitely in need of being changed. it was very brown and or black but there was no chunks or Debris in there. The car since then has atleast been shifting quicker and a little smoother but I have noticed that it still feels like theres not a solid connection between the engine and the wheels thats the best way I can describe it. It still shifts rough sometimes and its delayed when I give it gas, and in auto mode you can see that when you give X amount of throttle the rpm goes up a few hundred like 2 or 3 past what it normally would and then comes back down and rests and almost feels like it kind of locks. There doesnt appear yo be any rpm flair when I shift though it drops right into next gear usally unless I am missing something

 

[papertowel]

yes your reader should catch some sort of LOP code, I would start by checking the battery voltage/connections reload your Tune (ZZP HP?) and see if that wakes up your Regal

What connections would you say i should check?

 

[agaric]

Maybe the Variable Valve-Timing solenoids?