W201 Air flow potentiometer

[tr3me]

Hello!

My car is 190E , 1.8 and -92.

I tried to install new air flow potentiometer and the problem is measuring the voltage. It says between the mid pin and top pin there should be 0,7 V. But when i measure that, it shows 0,3-1,1 V !! Voltage just jumps all over the time and i cant get it to stay still.

And i cant really keep it like that, idle run is very bad (jumping), the car shuts off at almost every stop.

Here is what i mean

SG-Motorsports Air Flow Meter Potentiometer Replacement

Please help me!
Thank you!

 

[Terry_]

Try disconnecting the idle slide and driving it. You will have to keep the throttle up at cold start for a minute

 

[tr3me]

Thanks for responding

Idle slide is that little black clip with lever which is connected to throttle (and 2 conductors goes to that clip) right?

Well i did that, the idle running went clearly better (not jumping so much), when motor was hot. But the voltages still was jumping a little bit. Sometimes the voltage stayed still, but when i little bit tighten the screws, it started to jump around 0.650-0.950... etc

what next?

 

[5oulman]

Hi guys,


Did you have any joy with this?

I have a 92 2.0 190E with same problem although. When disconnected it had same issue... I have noticed that this is a problem I've seen on many forums but unfortunately there have been no proper solutions or ideas of what it could be.

Any help would be much appreciated...

Thanks in advance.