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 03-10-2007, 06:53 PM
Registered User
 
Join Date: Jul 2003
Posts: 548
initial air/fuel adjustment hex position

1983 380 sl. What position is the best initial to start from, I replaced my fuel distributor with a spare but it won't run it starts and dies if at all.
I sthere a way to determine electronically where itshoeuld be started from and then adjust. Or mechanically.

__________________
Thanks, Juan
Reply With Quote
  #2  
Old 03-10-2007, 08:04 PM
Registered User
 
Join Date: Jan 2007
Posts: 242
make sure first that all the other part like electrical and fuek system are working right, its an elimination game, may I ask why you need to replace the fuel distributor to best understand your situation (facts).
Reply With Quote
  #3  
Old 03-10-2007, 09:18 PM
Registered User
 
Join Date: Jan 2007
Posts: 242
you'd also need a co guage to get the right adjustment for your CO
Reply With Quote
  #4  
Old 03-10-2007, 09:23 PM
Registered User
 
Join Date: Jul 2003
Posts: 548
I stripped one of the distributor lines so I replaced with one from a wrecker, the problem is the one I removed is gone from my garage. The one I installed, hex screw was backed out all the way, as lean as possible i think. Now I can start my car and don't know how many turns to go clockwise to make it rich, start to then adjust slowly. Need an idea of how many turns to go in order to get car to run.

Thanks
__________________
Thanks, Juan
Reply With Quote
  #5  
Old 03-10-2007, 11:31 PM
250 Coupe's Avatar
Middle Aged Member
 
Join Date: Mar 2004
Location: Des Moines, WA
Posts: 910
I would try 1/4 turn increments until it starts and runs well enough to find a CO meter.

Mine has about a 1/2 turn range between too rich and too lean so don't try for big adjustments even if it seems like you have been trying for a long time. You may overshoot the correct setting.

I don't know it it will work, but you could try pressing down on the air plate and turning the screw until you just begin feeling resistance from the metering pin. You will need fuel pressure to do this but don't press the plate down with the ignition on or you will flood the engine badly.

Michael
__________________
Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120

Last edited by 250 Coupe; 03-11-2007 at 08:53 AM. Reason: Carbon Monoxide not Dioxide
Reply With Quote
  #6  
Old 03-11-2007, 12:38 AM
Registered User
 
Join Date: Jul 2003
Posts: 548
i will try that step. thanks
__________________
Thanks, Juan
Reply With Quote
  #7  
Old 03-11-2007, 08:08 AM
zcc's Avatar
zcc zcc is offline
Registered User
 
Join Date: Nov 2005
Location: Kuwait
Posts: 610
And make sure that u have enough fuel in the tank. I wasted 2 hour for the same problem u mentioned cuz I didn't have enough fuel in the tank!
__________________
Master Computer Engineer, A+, Network+, MCP/MCSA/MCSE 4/2k/2k3 - Messaging, MCTS, MCITP, MCT, Brainbench, ICDL and starting Ph.D

380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current


http://search.ebay.com/_W0QQsassZkhazenzcc
Reply With Quote
  #8  
Old 03-11-2007, 08:43 AM
Registered User
 
Join Date: Jan 2007
Posts: 242
best way to deal with your situation is to get to a garage with CO tester and have it adjusted there to save you the wasted fuel with guessing game in adjusting and I assure you that you will never get to the right adjustment until you use a CO tester, time and time again people would rather think they can adjust it but in reality there is just NO WAY, you not only waste fuel during the adjustments you will also waste fuel while driving the car due to wrong mixture which cause wasteful fuel to no use.
Reply With Quote
  #9  
Old 03-11-2007, 10:36 AM
Registered User
 
Join Date: Jul 2003
Posts: 548
After I get the car running, I will have the CO tested to minimize waste. I have access to CO meters at work. What CO values should I be looking for exiting the tail pipe?
__________________
Thanks, Juan
Reply With Quote
  #10  
Old 03-11-2007, 12:01 PM
250 Coupe's Avatar
Middle Aged Member
 
Join Date: Mar 2004
Location: Des Moines, WA
Posts: 910
If it is a US spec car, it will be on the frame alongside the radiator. Mine is .2% - 1.5% at idle, vacuum connected.

Michael
__________________
Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120
Reply With Quote
  #11  
Old 03-11-2007, 02:55 PM
Registered User
 
Join Date: Jul 2003
Posts: 548
Success at last. My wife started the car a few times for me while I messed with the hex screw, and the air inlet flapper 8 full turns clockwise was required to get the motor to start and stay running.
Now I need to make sure all vac connections and timing are proper so that I can smog the beast in Californication Smog test only shop.
__________________
Thanks, Juan
Reply With Quote
  #12  
Old 03-11-2007, 08:25 PM
just-n-time's Avatar
Registered User
 
Join Date: Feb 2006
Location: Louisiana266 Maloy Rd winnfield71483
Posts: 804
Question Timing

Quote:
Originally Posted by deportes View Post
Success at last. My wife started the car a few times for me while I messed with the hex screw, and the air inlet flapper 8 full turns clockwise was required to get the motor to start and stay running.
Now I need to make sure all vac connections and timing are proper so that I can smog the beast in Californication Smog test only shop.
The reason it would not run was it only got the cold shot of fuel,as you said the mix was way to lean,timing is not set manually. Do the vacuum thing if you can, do a smoke test to find any leaks. you can set the on off ratio with a meter(volt) search you will find a few post on how to.JNT

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 06:07 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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