Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-11-2003, 09:07 AM
Registered User
 
Join Date: Dec 2003
Location: Germany
Posts: 47
Question @DaveCT MB AFM pot

Hi Dave,

I can't believe it, another person with this strange Bosch part number 3430 591 017!

I tried to figure out what pot I will need, over the last couple of days.

I called MB, and Bosch but yet no answer. MB is currently checking this topic.

Now, I discovered your posting that the pot 3437 224 035 doesn't fit. Did you find the correct replacement or did you change the whole AFM? If the latter, have you investigated whether there is exists a replacement and if so, how hardly?

Cheers Tom
Reply With Quote
  #2  
Old 12-12-2003, 12:44 AM
Registered User
 
Join Date: Apr 2001
Location: Joliet Illinois
Posts: 309
Airflow meter pot

Try www.olyparts.com. They sell replacement pots and they should know which number to use as a replacement. I had a question regarding a superceded part number and they supplied the answer. They are also one of the few (if not only) suppliers that will sell the pot independent of the airflow meter.

John
Reply With Quote
  #3  
Old 12-13-2003, 02:29 PM
Registered User
 
Join Date: Dec 2003
Location: Germany
Posts: 47
Unfortunately they don't.

Meanwhile I found a thread from a guy from the Phillipines that the replacement AFM for his MB of 1986 had a pot with the number 3430 591 034. However, olyparts didn't know this number either.

HELP!!! Knowbody outside who knows the replacement number of the 3430 591 017 pot?!

Tom
Reply With Quote
  #4  
Old 12-13-2003, 02:54 PM
daveCT's Avatar
Registered User
 
Join Date: Jun 2002
Posts: 455
i never found a replacement pot for the 017, just a whole new airflow sensor from MB or Bosch a source, about $450 bucks for it .
Reply With Quote
  #5  
Old 12-13-2003, 03:02 PM
Registered User
 
Join Date: Dec 2003
Location: Germany
Posts: 47
Could you maybe check the number on the pot of the new AFM? I would very much appreciate this, since the part with this number should be deliverable (I would guess).

I hope, the guy from the Phillipines just had a typo in his number.

Cheers
Tom
Reply With Quote
  #6  
Old 12-13-2003, 03:11 PM
daveCT's Avatar
Registered User
 
Join Date: Jun 2002
Posts: 455
i never got a new A/F meter , just adjusted it back to spec and got the CO just right , and found the real problems for slow speed reving was a bad CIS water sensor with a broken wire,
and the gummed up idle flow sensor with cracked tubes fixed it

whats the problem are you having with the euro 16v ??
Reply With Quote
  #7  
Old 12-14-2003, 06:37 AM
Registered User
 
Join Date: Dec 2003
Location: Germany
Posts: 47
I just discovered something.

My readings with engine off:
Pin 1 & 2 AFM untouched: 4,7kOhm
Pin 1 & 2 max resistance: 16kOhm
Pin 1 & 2 in between: except idle deflection continuously rising resistance with rising deflection until max then falling - at the upper measure points the resistance falls off 1-4k after a second (digital multimeter)
Pin 1 & 3: always 4,13 kOhm

Now, how can be 1&2 > 1&3? Since the trim pot is serial to 1&3, 1&2 must be smaller 1&3 unless there is a further resistance at 2. So maybe the contact of 2 has a serious problem itself (dirt) and not only the layer on the pot?!

How did you notice that your new pot didn't fit. "Just" because the engine didn't run as well anymore or did you measure different resistances or anything else?

Tom

By the way, its a 300SL from 86
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:23 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page