Hello there, so I have gotten my engine issues basically figured out. The only codes it is reading now is either it is running too lean or too rich in either bank, it switches and is not consistent.
But the issue I am having now is a transmission shudder, the car acts like it doesn’t know what gear to shift into and it will go away if I step on the pedal more to force it to down shift or if I let off the gas. The other thing I have been doing is taking it out of overdrive and that seems to help but I still get some shutter.
The car is reading no transmission codes, but it has slipped a few times.
Would rebuilding the transmission take care of this issue? Any insight would be helpful!

Yes I am getting the P0171, and no there is no transmission fault message. Thank you for your reply!

I have gone through and replaced all the clamps on the hoses but maybe some they need replaced completely. When I run the STFT and LTFT data what should they read/be set at?
It is a 2001 S Type 3.0.
I greatly appreciate the help!

All of your help has been very beneficial. Changed the elbow hose behind the manifold, it was collapsed.
Now there is only one cylinder, number 4, that is not getting any fuel. There is spark from the plug and I have switched the fuel injectors around and the coil packs and they are all working because they do not cause the same problem when I switch them around. It is just that one cylinder, also I checked the fuel lines for any blocks.
Any helpful tips?