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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-04-2008, 11:47 AM
Registered User
 
Join Date: Nov 2008
Posts: 3
92 300d flaper in intake?

Hey all , kind new to this so hears the question , 1992 300d 2.5 turbo , what is the flapper valve in the intake for ? it seems to be closing just off idle and making the engine miss & smoke , if I disconect it at the vacume line on the fender alls well . thanks for any input in advance , craig
Reply With Quote
  #2  
Old 11-04-2008, 01:03 PM
2.5Turbo's Avatar
602 648 113 A630
 
Join Date: Feb 2006
Location: Tacoma, WA
Posts: 900
The flapper is there for more precise control over the mixture of EGR gas to fresh air. The computer closes off the flapper and opens the EGR if it needs more EGR gas. If you still use the stock wastegate system, you'll need to have both the EGR and the flapper valve functional for the computer to allow boost.

It shouldn't affect idle under normal conditions. If it is, it may be sticking closed or the lines to the EGR and flapper valve may have been switched. If you're getting boost, everything's probably OK.
__________________
Dale

http://i52.photobucket.com/albums/g1...MG_2277sig.jpg

1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz


Pre-glow - A moment of silence in honor of Rudolph Diesel
Reply With Quote
  #3  
Old 11-05-2008, 04:48 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Eliminate the EGR and Flapper (+a bunch of other Crap)

Member GSXR has been the pathfinder on this worthy project.
It will allow you to free your engine from the Tyranny of the EDS (Computer)
whose sole function is to "Deny You Boost".

Wastegate actuator swap for OM602.962?
__________________
'84 300SD sold
124.128
Reply With Quote
  #4  
Old 11-05-2008, 12:19 PM
Registered User
 
Join Date: Nov 2008
Posts: 3
falper in 92 300d

Hey thanks , this is all good stuff , I have been a marine diesel tech for 20 years and this 300d is shurely different, why do they want to restrict fresh air into any diesel?? this will surely mess things up , the air flapper on mine seems to choke off 3/4 to 7/8 of air flow coming off idle from about 900 to 1800 rpm intermitintly when the flapper does not move we run great , when it pulls vac to the flapper sol we chug & smoke untill the rpm goes up past 2000 then runs fine, was thinking of just dropping flaper vac line & driving with unrestricted air flow?
Reply With Quote
  #5  
Old 11-05-2008, 01:26 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
Is the flap sticking? It is a spring-loaded air-flow metering device, with an intake air temperature sensor, that's all. A passive device. The minimal amount of pressure delta across a properly-functioning airflow meter should not affect the engine's performance.

If it's bad, and you don't have the time to switch to a pressure-operated wastegate, there certainly are used ones around.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #6  
Old 11-05-2008, 03:02 PM
Registered User
 
Join Date: Nov 2008
Posts: 3
flaper

No , this is a vacume active sol , the vac line goes to a electric valve looking thing on the pass side fender. it dosent look like its sticking , the vacume pulls the flaper closed, there is a multi wire plug on top of the valve on the fender, I think the computer controls the valve, this set up does not have a waste gate , are they trying to limit boost by dumping exhaust gas back into the intake track? if so its a bad idea , makes for a very foul intake system.
Reply With Quote
  #7  
Old 11-05-2008, 03:38 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
Okay sorry, I thought that you were talking about the airflow sensor mounted under the air filter assembly.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #8  
Old 11-05-2008, 04:00 PM
amg280's Avatar
Registered User
 
Join Date: Apr 2002
Location: NY
Posts: 530
Quote:
Originally Posted by compress ignite View Post
member gsxr has been the pathfinder on this worthy project.
It will allow you to free your engine from the tyranny of the eds (computer)
whose sole function is to "deny you boost".

Wastegate actuator swap for OM602.962?
+1
__________________
93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K
Reply With Quote
  #9  
Old 11-05-2008, 04:16 PM
cscmc1's Avatar
Registered User
 
Join Date: Dec 2001
Location: Central IL
Posts: 2,782
Quote:
Originally Posted by amg280 View Post
+1
+2. I did the conversion; well worth the minimal effort and cost.
__________________
1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)
Reply With Quote
  #10  
Old 11-05-2008, 09:06 PM
oldiesel's Avatar
Registered User
 
Join Date: May 2007
Location: florida
Posts: 677
if you plan to keep the car follow GSXRs posting on changing to a pressure operated wastegate actuator and save yourself a lot of time/money.Your car has a vacuum operated wastegate that is controlled by a couple of electrically operated vacuum valves that are controlled by the EDS (computer module) and it will prevent the turbo from making boost unless all that junk long the inside of the passenger side fender is operating properly,and just one of those vacuum transducers will cost more than the conversion. Don
__________________
Red Green "This is only temporary,Unless it works!"

97 E300D 157000 miles
87 300TD ?141k? miles
Reply With Quote
  #11  
Old 11-06-2008, 12:19 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Do Not ever Look in your Intake!

emarine01,

The Damn Flapper is functioning correctly.It is to restrict fresh air and increase
EGR Smut intake at idle.
The combination of the EGR Smut and the Valve Cover (Crankcase Pressure Relief)
Oily Vapors inserted Upstream of the Turbocharger Intake contaminate
the Intake Tract (Can clog Pressure sensors for Overboost,Etc.).
If you unscrew one of the Devices (or a Plug) on the driver's side of the Intake
Runner,You will be appalled at the crap you see.

This shot is of gsxr's intake valve port.
Attached Thumbnails
92 300d flaper in intake?-screenhunter_02-nov.-06-00.23.jpg  
__________________
'84 300SD sold
124.128
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 08:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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