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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-03-2009, 03:53 PM
Mercedes4-ever's Avatar
Registered User
 
Join Date: Nov 2005
Posts: 42
Turbo Bad its make me crazy

Hello Peepz
when i drive on the highway whit my 300DT turbo diesel w123
The Turbo keeps in and keeps off somtimes and the car is very slow than
i have measured the turbo boost its give 0,65 mbar bij 3200 RPM

i have clean the banyobold
what is the problem
its make me crazy
__________________

Last edited by Mercedes4-ever; 05-03-2009 at 04:01 PM.
Reply With Quote
  #2  
Old 05-03-2009, 04:06 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 34,237
orry, but your comments are a little hard to understand. Could you give more detail about the nature of the problem you are having with the turbo, please?
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #3  
Old 05-03-2009, 09:17 PM
Registered Hack
 
Join Date: Mar 2008
Posts: 4,612
what is "bij"

if you are satisfied with that boost level, and it is consistent, the next step is to trace that line from the 'banjo bolt' to a little solenoid on the firewall.

Clean, clean and clean all the associated lines and that little solenoid.
__________________

Reply With Quote
  #4  
Old 05-04-2009, 01:41 AM
Mercedes4-ever's Avatar
Registered User
 
Join Date: Nov 2005
Posts: 42
I have cleand al the line
banyobolt vacuum boost switch
but the car works not fine somtimes it has no power and somtimes its ride amazing
When i baybass tis part it have more power see picture


When i take the wire of this part it ride fine with full power see picture
what the oe nummer of this part? How can i check this part? i think this part is bad



i have renew al the filters
valve are adjust

and the turbo boost is 0,65bar =9psi
__________________
Reply With Quote
  #5  
Old 05-04-2009, 01:45 AM
ForcedInduction
Guest
 
Posts: n/a
9psi is normal.
Reply With Quote
  #6  
Old 05-04-2009, 01:48 AM
Mercedes4-ever's Avatar
Registered User
 
Join Date: Nov 2005
Posts: 42
Quote:
Originally Posted by ForcedInduction View Post
9psi is normal.

Yes i think i have an electrical problem
i think that thing on the intake manifolt
__________________
Reply With Quote
  #7  
Old 05-04-2009, 01:55 AM
Registered Hack
 
Join Date: Mar 2008
Posts: 4,612
that is the pressure switch. - clean it out if you suspect it.

test for continuity across the contact and the threads. If it is stuck, you will have continuity.

judging by the dirt on the solenoid on your firewall, you have not removed it for a thorough cleaning - fill it repeatedly with WD-40 and shake the living he!! out of it.
__________________

Reply With Quote
  #8  
Old 05-04-2009, 02:23 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
Pressure Switch

"Closes" Provides Ground (Negative) to your Overboost Protection Solenoid
[In your picture,on the Firewall].
When a pre-set pressure level is reached.Thus denying Fueling to the "Overboost".
When the Pressure Switch "Sticks" (At a lower Boost pressure) it denies fuel
to feed Normal Boost(AND thus your lack of Ooomph).

ALL the CRAP from the EGR Dust and Oil mist from the valve cover tube feeding
the crankcase gases back into the Intake conspire to close off all of the Over-
Boost system...AND it's gotta be cleaned out!
Attached Thumbnails
Turbo Bad its make me crazy-screenhunter_09-may.-04-02.23.gif  
__________________
'84 300SD sold
124.128
Reply With Quote
  #9  
Old 05-04-2009, 11:21 AM
Registered User
 
Join Date: Aug 2006
Location: London, Ontario, Canada
Posts: 543
Just bypass the switch entirely, run the line from the intake manifold banjo bolt to the alda. i have run this for year and years without any issue.
__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
Reply With Quote
  #10  
Old 05-04-2009, 01:28 PM
Mercedes4-ever's Avatar
Registered User
 
Join Date: Nov 2005
Posts: 42
Quote:
Originally Posted by Icefire View Post
Just bypass the switch entirely, run the line from the intake manifold banjo bolt to the alda. i have run this for year and years without any issue.
They said baypass will damage the motor
it wil make you headgasget stuck
__________________
Reply With Quote
  #11  
Old 05-04-2009, 01:38 PM
DeliveryValve's Avatar
Chairman of my Benz
 
Join Date: Jun 2006
Location: Central California
Posts: 4,110
^^ There are various opinions on the bypass out there. But I would rather fix it and keep that protection device.
__________________
1983 123.133 California
- GreaseCar Veg System


Reply With Quote
  #12  
Old 05-04-2009, 02:21 PM
Registered User
 
Join Date: Aug 2006
Location: London, Ontario, Canada
Posts: 543
The sensor and switchover valve cuts the boost signal to the alda if an overboost situation should occur. Generally there are 2 incidents where this could occur, 1 your wastegate hose breaks, and you do not notice it in time. 2 your wastegate seizes closed.

These are very rare incidents, and I generally replace the wastegate hose every few years.

Your call.
__________________
1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
Reply With Quote
  #13  
Old 05-05-2009, 01:56 AM
Registered User
 
Join Date: Jul 2007
Posts: 517
i did what icefire did too with no problems. part of my power/acceleration issues were cured by this very simple solution. i did run a boost gauge though just to make sure nothing goes above 9psi
Reply With Quote
  #14  
Old 05-05-2009, 09:54 AM
mobetta's Avatar
(Oo{-I-}oO)
 
Join Date: Mar 2006
Location: minnesota,hey.
Posts: 1,840
what about that kid who was running like 35 psi w/ no bad effects?( aside form there is no need to run that psi)

(* I recall some such story from the performance and tuning)
Reply With Quote
  #15  
Old 05-05-2009, 09:57 AM
ForcedInduction
Guest
 
Posts: n/a
Quote:
Originally Posted by mobetta View Post
what about that kid who was running like 35 psi w/ no bad effects?
Have we ever heard from him again? Exactly.
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 08:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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