which are the sources for the pot, where did everybody buy it from? and how much?

Page #1... Post #1.. Arrived in about a week..

Jay

ok my AFm number is 0438121022, and my potenciometer part number is 3437224031, wich doesnt match anybodys pot number here'?????? mine is an euro 16v 1985........................

not looking to good DJ, You might be in need parts from europe,
to get a A/F meter or Pot , what does the local dealer in S.Amercia
say about these numbers for your euro 16v?
Dave

sigh..................................

Part Number Concern
 

I just ordered a airflow meter pot for my '88 260e (part no. 3437224035) and now I am having concerns that it is not the correct part. My original pot had 3437224015 on it which supposedly cross references to 035 but when I have not been able to verify that. Has anyone successfully substituted the 035 pot for the 015 or does anyone know of a website that cross references bosch parts. The Bosch site would not recognize either number.

Thanks,

John

Re: Part Number Concern
 

It's the right one.. It's just been slightly re-designed.

Jay

I installed the 035 in my '86 300E. It fit perfectly and I and was able to adjust it to the spec.

Thanks!
 

Thanks Guys,

I should have the new pot next week and we'll see how that goes.

I'm still wondering if it's best to try to adjust the trim pot on the new one to match the old one before installing the pot. I assume you take the resistance readings with the pot out of the car (no wiper contact).

-John

Congratulations ctaylor738,

I have a 260E, 1988, and shows some irregural idle/stalling and I plan to clean the pot.

Could you please indicate (step by step) the procedure you used for adjusting the pot .

it is described in the earier posts... also i have a brand new pot 035 that i bought for a 16v ,that was the wrong one anyone need it
60 bucks shipped
thanks
dave

Here's my contribution to the literature ...
 

http://www.peachparts.com/shopforum/tech-help/72559-300e-airflow-sensor-replacement-old-guys-viagra.html#post453980

You should note, though, that the crappy idle and stalling showed up again a few days later.

Pot Replacement a Success
 

I replaced the pot in my '88 260e today and the car idles smooth as silk now - no surging or stalling.

Before replacing, I measured the resistance of the old and new pot (pin 1 to 3) and they were 4.07 k ohms and 4.06 k ohms respectively. I also measured the resistance of the trim pot terminals directly, 56.7 ohms old and 56.6 ohms new. Since they were so close, I did not adjust the trim pot.

The replacement pot has the 035 number and the shape of the wiper is a little different from the original 015. The new pot did not come with the rubber perimeter seal so I had to transfer that from the old one.

Aligning the pot on the air flow meter was easier than I thought it would be. I left the mounting screws slightly loose and hooked up a volt meter from the number 2 pin to ground. The car started and ran fine so I rotated the new part clockwise until the voltage dropped way down and the engine died. I turned it back counterclockwise until the voltage got up to about 7.5 volts and the engine surged and died. I ended up setting the alignment at .67 volts (actually it fluctuates between .64 and .69 and called it good.

Thanks everyone for all your help and input.

-John

Thanks John

your description is cristal clear, when I will change my Pot I will use it.

ALIGNING THE POT
 

MR. jOHN PLUT.

CONGRATULATIONS. Excuse me for this stupid question.: Aligning

the pot is done running engine?

Any damage risk rotating the pot with running engine?

Did you get 0.69 V, rotating clockwise from the down end ?


Thanks.


Mario farias
laprefar@cantv.net