I mentioned the poor acceleration + fuel economy earlier in the thread...
It just does not accelerate hard like it used to. It almost "feels" like the engine is being flooded during acceleration because it does not spin as quickly. Before I could give it light throttle off the line to about 2500rpm then kick down hard and it would really, really pull almost chirping the tires. I can't get anywhere near that close anymore.

Found the influencing variables for my particular model:
I've crossed off everything I've 100% ruled out.


O2 sensor is brand new, and it reads the same, albeit refreshes faster, as the old one.
No TPS, only airflow potentiometer. I will check voltage though to confirm (7v +-.10v at idle).
No EGR on 87 M103.

Any information on how to check:

-Altitude Sensor?
-Hall Sensor?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k