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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-18-2010, 02:11 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Changing Fuel Distributor on 300E

I have two spare fuel distributors, one is from a 1990 300E and the other from a 1987 300e. My car is an 1989 300E, i want to switch my distributor with the 90. My question is do I have to reset the Lamda, and what is that, the ECU??? I have the service manual on my computer and it seems that i just unscrew all the fittings and reattach. Seems easy enough, i didnt see anything for torque specs either. Is there more than meets the eye or is it really an easy DIY job??

Reply With Quote
  #2  
Old 07-18-2010, 11:19 PM
cth350's Avatar
Registered User
 
Join Date: Dec 2000
Location: Long Island, NY
Posts: 3,840
replacing the part is about that easy (don't forget the seal under it). The fun part is adjusting the FI system for smooth operation.

The lambda feedback is provided by the black EHA module on the side. With it, the computer can compensate for lots of ills, but only if the physical components are actually working as intended. For instance, no vacuum leaks, correct fuel pressure, clean component passages, correct setting for the air flap, properly working relays, unbroken wires. (Jeez that list just feels longer every time we write it.)

-CTH
Reply With Quote
  #3  
Old 07-19-2010, 02:25 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Alright so i dont have to reset anything? Also you say adjusting is fun, but i hate it especially when i dont have a gas analyser to see what i'm doing. The only adjustment im familiar with is the fuel/air mixture beside the fuel distributor i think its a torx screw. Other than that I dont know what else to adjust. Any suggestions on how to tune it properlly without a computer analyser?
Reply With Quote
  #4  
Old 07-19-2010, 02:29 PM
handsworth's Avatar
420SEL "Big Boy"
 
Join Date: Jul 2001
Location: Suburban Cleveland, ohio
Posts: 117
That seal that CTH350 mentioned is a rubber O ring. I had to order a new one because when I tried to reuse the old one, it did not seat well.
Reply With Quote
  #5  
Old 07-19-2010, 03:39 PM
ps2cho's Avatar
Registered User
 
Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,523
Well you may have to depending on the comparison between the two. If the new one is in better condition, you may need to adjust the mixture a little leaner since it will be providing more fuel. Just double check to make sure the A/F mixture is 50% and leave it alone.
__________________
2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k
Reply With Quote
  #6  
Old 07-19-2010, 05:37 PM
Registered User
 
Join Date: Aug 2008
Posts: 436
Is there any differences in ECU's which would effect things? 87,89, and 1990?

I wanted to say the 1990 and 1991 are open head design where the earlier cars had a different combustion chamber shape/size. So the EZL and ecu may be different.

michael

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 01:16 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page