95 E320 replaced fuel injector

[oldtrucker]

Here I am, replacing all fuel injectors on my 95 E320 W124 104.992 California, because I am still chasing idle and performance problems after the PO drove it into the ground with bad ECO wiring.
What do I get now?
Suddenly, I have an elevated idle at about 1300 RPM's in Neutral and about 900 RPM in Drive.
First thought, I get un-metered air. Nope, I checked for leaks around the areas I worked on.
Acceleration from mid range does exist in its modest form. Always had been this way. I am not driving that fast any-more, anyway.
Using kick-down helps a little, but I have to get off the accelerator a bit. Been doing this ever since the replacement TA.

Replaced parts so far:
New Spark Plugs
Replacement throttle actuator
Updated wiring harness
New Ignition coils
Replaced almost all vacuum lines
New OVP
Replaced e-gas computer (was damaged by old Throttle Actuator)
Cleaned out EGR pipe
New fuel rail pressure regulator
New fuel filter
New Oxygen sensor
Another purge valve
New Cam positioning sensor
and probably more, just can't remember any-more.

The hard code I am reading is 6
"Idle speed control incorrect, fault from EA/CC/ISC"
Duh, I know that much, since my idle is high.
No other codes.

I am stunned!
Tried to reset ECU, but that doesn't happen because of the existing code, I believe.

The only thing I can think of, is to disconnect the battery and try to reset after reconnecting, don't believe it will change a thing.

What can go wrong, by simply replacing the fuel injectors?
Nothing is leaking!
Nothing is sucking air in where it shouldn't!
Why is the idle suddenly 300 RPM's higher than before?
Wrong injector? They claim it is for my model.

I had codes saying that the "Throttle valve potentiometer actual value too low." before.
However, I dismissed those codes, since they seemed to appear at random.
Is it possible that the ECU has taken a hit too from the old broken (wiring) Throttle Actuator?
Random codes, CAN bus errors, one would think!
Is my replacement TA faulty, sending the wrong signals?
Too many questions, no answers, can be real frustrating....

If this keeps on going, I could have bought a new one, ha, ha...