Anyone with 190E 2.0l approx 1989mod?
 

What lambda reading do you have when driving car and giving full throttle, mine is running 0,47v and going down to 0,17v when driving up hill with full throttle. You cant get these readings standing, engine must be over 80degrees celcius and driving.

.47V at constant speed is OK
.17V at full throttle/load is very lean
The ECU and/or the EHA may not be functioning correctly.

Yes, but its not changing when turning the screw. What happend when turning half turn is not running good. Have changed ECU and two different EHA tested. Car is running good now after turning screw 1/4, but then again its not good enough when running lean when power is needed.

mb:

If, perchance, you are reading the O2 sensor voltage with the sensor unplugged from the harness, then the ECU will not receive the lean indication, and as a consequence, will remain in open loop without mixture correction.
The other important control inputs are: the full throttle contacts on the throttle body, and, the air-flow potentiometer.

No you dont get that reading with lambda unplugged, i just need someone with same engine and same jetronic to test to compare values. Its one thing what everyone think it should be, but its another thing what they actually give out. And there is different version of the KE-jetronic, have to collect data from similar. I have extra throttle body and they give same values from the air flow. Maybe only the original Bosch lambda can give the correct data to ECU, maybe aftermarked is messing up with wrong value back? Must be a reason why the Bosch is 200dollars and aftermarked 30..