Originally Posted by ajschank

Okay O2 sensor was hooked up still, I'll have to check its functionality via diagnostic port or bench testing I've seen is an option too. Not sure exactly how, but I can use the search feature for that. While i was out testing, I unplugged the EHA and the car's behavior didn't change at all when warm which I presume is to be expected? Unplugged both EHA and O2 sensor with no change in behavior.
Is there a way to take the air flow potentiometer off and clean the contacts off with a pencil eraser? I did that trick on my SL's TPS and it seemed to help (electronic djet). I have messed with adjusting the EHA before on my 126 but that was because it ran horrible when I got my hands on it. My 124 runs well in comparison to what that was like, so I am a little hesitant to adjust the EHA and cause adverse effects.