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 09-22-2008, 05:59 PM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
How Fast Should 300SDL be?

Mine's pretty slow.... Got the flex pipe replaced and made a little difference but how fast should it be?

New fuel filter, new air filter... What else causes sluggish acceleration?

Reply With Quote
  #2  
Old 09-22-2008, 06:23 PM
Hatterasguy's Avatar
Zero
 
Join Date: Nov 2002
Location: Milford, CT
Posts: 19,318
Time a few 0-60 runs and report back. You should be in the 10-12 second range.
__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200
Reply With Quote
  #3  
Old 09-22-2008, 06:37 PM
compu_85's Avatar
Cruisin on Electric Ave.
 
Join Date: May 2008
Location: La Conner, WA
Posts: 5,234
Check that all the small "vacuum" lines on the drivers side of the engine aren't plugged with soot. Mainly the one going from the intake to the lill valve unit.

-Jason
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.
Reply With Quote
  #4  
Old 09-22-2008, 08:09 PM
RAYMOND485
 
Join Date: May 2005
Location: CALIF
Posts: 508
Slow 300sdl

1984 300d turbo 147k
clean the rear intake plug to the alda, pressure test alda 10 psi with top of a hand vacuum pump use fuel press gage, replace fuel lift pump assembly $15o.00 or kit $40.00 plus s&h OR INSTALL A 12 VOLT ELECTIC FUEL PUMP KIT **************.COM $159.00
Reply With Quote
  #5  
Old 09-22-2008, 08:35 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
10.5 seconds is very fast.
12 seconds is typical.
Reply With Quote
  #6  
Old 09-22-2008, 10:01 PM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
i'll time her 2maro
Reply With Quote
  #7  
Old 09-22-2008, 11:32 PM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
0-60 Pretty Slow

29 Seconds and 33 Seconds....

Mechanic Said Turbo was working fine, and had no leaks...

What could be clogged i got the day off and are working on her 2maro
Reply With Quote
  #8  
Old 09-22-2008, 11:35 PM
bustedbenz's Avatar
Registered User
 
Join Date: Feb 2007
Location: Valle Crucis, NC
Posts: 2,283
A loss that significant sounds like fuel starvation. Change both fuel filters (the in-line filter and the spin-on cartridge) and report back.

EDIT: just saw that you already have a new fuel filter. Did you change both filters or just one? Make sure they're both clean.

Also, take an air compressor, take off the fuel return line to the tank, and blow some air backwards through that line to blow any grit or algae off the strainer in the bottom of the tank temporarily, just to experiment.
__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL
Reply With Quote
  #9  
Old 09-22-2008, 11:39 PM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
I did the one that is right near the engine itself... Wheres the other filter?

How do you do all this stuff to the tank, i have access to my fathers garage and all the tools in the world, but i am no mechanic.
Reply With Quote
  #10  
Old 09-23-2008, 12:29 AM
bustedbenz's Avatar
Registered User
 
Join Date: Feb 2007
Location: Valle Crucis, NC
Posts: 2,283
Quote:
Originally Posted by ggspeed View Post
I did the one that is right near the engine itself... Wheres the other filter?

How do you do all this stuff to the tank, i have access to my fathers garage and all the tools in the world, but i am no mechanic.
"right near the engine" - which one? They're both pretty near the engine.

One of them is clear plastic, the other is metal like a gasoline engine's spin-on oil filter. The plastic one is in-line with the fuel supply line, which comes through the firewall on the injector pump side of the engine. The metal one is up in front of the power steering pump reservoir. You remove the bolt from the top of it, maybe unclamp a bracket to get it out of the way, and then replace that filter as well. Fill it with clean diesel or diesel purge stuff or whatever you want to use that will burn as fuel so that the re-priming process doesn't take as long.

Re-priming in your car consists of leaning on the starter for up to 60 seconds until she fires up and keeps running.

The return line goes right next to the supply line back through the firewall, both lines attach to metal pipe things coming up into the engine compartment with screw-type hose clamps. Just unclamp the one going back to the tank (the one with no filters in line with it) and blow down the piece that goes back through the firewall with compressed air to just experiment with clearing the tank strainer from the front, so to speak. It's a temporary cure if that is the problem.

Maybe take the fuel cap off the back before you blow air through from the front just so you don't pressurize things and create a fuel jet somewhere if your vents happen to be plugged .
__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL
Reply With Quote
  #11  
Old 09-23-2008, 12:35 AM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
I figured out what filter needs to be replaced its the straight filter, so just put air into the return fuel line... ok will try, what about clearing the build up will i need to remove the tank?
Reply With Quote
  #12  
Old 09-23-2008, 12:38 AM
bustedbenz's Avatar
Registered User
 
Join Date: Feb 2007
Location: Valle Crucis, NC
Posts: 2,283
Quote:
Originally Posted by ggspeed View Post
what about clearing the build up will i need to remove the tank?
We need to know if there even IS any build up first. Generally you'll not have to take the tank out. There are products that kill plant life in the tanks (algae) and de-gunk things, breaking down the goo into a material that gets past the strainer and fills your filters up again. Before pouring this 'biocide' into the tank, stock up on half a dozen filter sets and carry them plus your tools with you at all times. This is all assuming we discover a blockage, it may be perfectly clean back there.

Worst case scenario, the strainer drops out the bottom of the tank and you'll have to catch the remaining fuel somehow.
__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL
Reply With Quote
  #13  
Old 09-23-2008, 12:43 AM
Registered User
 
Join Date: Jun 2008
Location: Connecticut
Posts: 241
Ok, i'll get back 2maro when i find out more info and can see what the next step is thanks a lot for your help

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 06:16 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page