300E bad ECU? how to decipher these weird readings

[denisgav]

So I got myself a 1992 300E 4Matic for $400. It starts extremely hard when cold and feels really weak even when warmed up. I've narrowed it down to an extreme lean condition (revs up a hell of a lot faster when I press down the airflow plate and hit the gas pedal at once. Anyways my X11 pin 2-3 reading is steady at around .9V and bumps up to about 1.1V when I give it any amount of throttle. The airflow pot reads 83mv at pins 1 and 3 even after I swapped it out with a good known unit. OVP is good. Could this be a sign of a faulty ECU? How would you guys go about continuing to diagnose this car?