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 11-15-2006, 08:34 PM
Registered User
 
Join Date: Nov 2006
Posts: 8
87 300TD Wagon power question

I've purchased a 1987 300TD wagon to restore. The engine and tranny run great. It has 112K with no smoke,or oil burning problems. I changed all the filters and took it for a 400 mile ride yesterday. The best I could get it to do was 75MPH on level road. I seem to have the pedal floored most of the time. Is this normal? I'm not new to MB diesel's having owned a 240D,300SD and 95 300 diesel. But this is by far the slowest. Its suppost to have the most horsepower. I took the Trap oxidizer off today thinking it might be plugged but there was no problem . It had been modified and the chamber was hollow - no restrictions. Any ideas? How do you know if your turbocharger is working without having a boost gage ? Thanks,Jim

Reply With Quote
  #2  
Old 11-15-2006, 09:02 PM
R Leo's Avatar
Stella!
 
Join Date: Mar 2003
Location: En te l'eau Rant
Posts: 5,393
Quote:
Originally Posted by DieselinBlood View Post
I've purchased a 1987 300TD wagon to restore. The engine and tranny run great. It has 112K with no smoke,or oil burning problems. I changed all the filters and took it for a 400 mile ride yesterday. The best I could get it to do was 75MPH on level road. I seem to have the pedal floored most of the time. Is this normal? I'm not new to MB diesel's having owned a 240D,300SD and 95 300 diesel. But this is by far the slowest. Its suppost to have the most horsepower. I took the Trap oxidizer off today thinking it might be plugged but there was no problem . It had been modified and the chamber was hollow - no restrictions. Any ideas? How do you know if your turbocharger is working without having a boost gage ? Thanks,Jim
Check your throttle linkages to make sure that a floored pedal moves the power lever on the IP to a full load position.

My SDL had a similar problem (same engine as the 87TD you have) when I bought it. One of the throttle pivots located under the intake had come loose and flooring the pedal only moved the IP about 50% towards full load.
__________________
Never a dull moment at Berry Hill Farm.
Reply With Quote
  #3  
Old 11-16-2006, 02:45 AM
Registered User
 
Join Date: Dec 2003
Location: Vancouver Island, BC
Posts: 61
You should check the boost pressure to the ALDA on the injection pump. I had purchased a w124 300TDt and had experienced the same issue, we found the boost overpressure protection valve on the firewall was plugged with soot, preventing boost pressure from reaching the ALDA, thus preventing more fuel to flow.
Reply With Quote
  #4  
Old 11-16-2006, 02:54 AM
Ara T.'s Avatar
Registered User
 
Join Date: Sep 2004
Location: Santa Rosa, CA
Posts: 2,075
It seems to me that the engine wouldn't rev up to 4500 RPM if the throttle linkages were not adjusted properly. Correct? How does it "go" in 1st gear?
__________________
1985 CA 300D Turbo , 213K mi
Reply With Quote
  #5  
Old 11-16-2006, 09:11 AM
Lacker of Diesel Knowledg
 
Join Date: Oct 2006
Location: Alpine, NY (central Upstate)
Posts: 89
Seems to be a VERY COMMON problem with those 603's in the 87 model. I just purchased my 300D sedan and see exactly the problem you are, I have not had time to work on mine as we are building the house and I won't be driving it till spring. Please let me know what ends up being the fix to yours. It's so much more help if people follow up their problem posts with solutions. Makes the search button a worthwhile venture, otherwise you just see lists of problems and potential solutions.
__________________
87 300D Turbo (still wondering about #14 head)
98 Buick Regal GS (one quick grocery gettr)
07 Honda CBR1000RR
04 Dodge Ram Laramie 4x4 CTD (heaven)
95 Dodge Ram 3500 CTD. Need snow plowed?
Reply With Quote
  #6  
Old 11-16-2006, 09:21 AM
riethoven's Avatar
Conservative Radical
 
Join Date: Apr 2005
Location: Eastern Long Island
Posts: 940
You can call Mercedes with your VIN and they will check on recalls. If your trap ox had never been done then you may be able to get an new exhaust system and if they deem that it caused the turbo to go then maybe a new turbo also.
__________________
Doug

1987 300TD x 3
2005 E320CDI
Reply With Quote
  #7  
Old 11-16-2006, 01:42 PM
Registered User
 
Join Date: Dec 2005
Location: Portland
Posts: 191
To answer one of your questions, this isn't normal. My 87 300TD can hit 90 without any trouble. What is your 0 - 60 time? That is one way to tell if your turbo is working. Should be in the 12-13 second range I believe.
__________________
=-=-=-=-=
1987 300TD 231,000
#22, afterglow, plastic fan, euro lights, alternator upgrade, cluster housing update
Reply With Quote
  #8  
Old 11-16-2006, 02:10 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
Original spec on the '87 300D was 9.8seconds 0-55mph with the trap-ox installed. My experience is that if it runs right, should hit 60 in under 10seconds with no trap-ox installed. Should top out around 120-125mph.

- Jeff Miller
190DT
Reply With Quote
  #9  
Old 11-16-2006, 02:53 PM
gsxr's Avatar
Unbanned...?
 
Join Date: Aug 2001
Location: USA
Posts: 8,033
Read this first - lots of info, applies to 1987 300D/TD, power is one of the issues addressed:

http://www.w124performance.com/docs/mb/articles/124.1x3_buying_tips.txt

0-60 time should be in the 10-12 second range. Slower than that, start tracking down the assorted possibilities... filters, IP linkage, ALDA signal line blocked, low/no boost, etc, etc...

__________________
Dave M.
Boise, ID

1997 E420 - 155kmi (Bugeyes)
1994 E420 - 145kmi (Blondie)
1993 500E - 193kmi (Lollipop)
1992 400E - 189kmi (Stinky Dirty)
Check out my website photos, documents, and movies!
Reply With Quote
  #10  
Old 11-16-2006, 03:25 PM
swogee's Avatar
Registered User
 
Join Date: Apr 2004
Location: San Luis Obispo, CA
Posts: 202
My 1987 300TDT is not slow. I can get sub 12 second 0-60mph acceleration times without a problem. It also has no problems cruising at over 75 mph if I don't pay close attention to my speed.

My 1987 300TDT has about 185K miles on it. When I first got it I discovered that the ALDA had a bad seal so the acceleration from a stop was slower than normal. After I fixed the ALDA, the acceleration time from a stop improved substantially. I still think I am having soming issues with the injectors though since it gets poor fuel economy (21-24 combined with mostly fwy driving) and it is noisy at idle. My 300TDT doesn't have the trap oxidizer since it was a Texas vehicle. I'm still chasing a few other issues as well.

-Steve
__________________
1987 300TDT smoke silver w/ burgundy leather interior
2000 VW Passat wagon indigo blue w/ beige leather interior
1985 Mustang SVO
1970 Chevrolet K10 fleetside, shortbed
Reply With Quote
  #11  
Old 11-17-2006, 12:04 PM
Registered User
 
Join Date: Nov 2006
Posts: 8
87,300TD Wagon,Thanks for the help

Thanks for all the replies. I worked on the car today checking linkages and vacum lines. I found some soot in the lines connected to the alda and blew them out.I took it out for a drive and the car still does 0 - 60 in 35sec. Right now I'm thinkin its the turbo. It starts right up and takes off with no hesitation to 30 mh .Then the acceleration slows right down.
Next week I'll take off the intake pipe and see if the turbo is free.If its free mybe the waste gate stuck. I'll post the results. Thanks, Jim
Reply With Quote
  #12  
Old 11-17-2006, 03:24 PM
lrg lrg is offline
Registered User
 
Join Date: Jul 2001
Location: San Francisco
Posts: 1,163
Swogee,

If you have an '87 that was originally sold in the US then it at least had a trap ox because they were all "50 state" cars in '87. It likely has been retrofitted with the later Trap Cat that is located further down the exhaust. The original "football can" that was next to the manifold should be long gone (at least I hope so).

LRG
__________________
LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold
Reply With Quote
  #13  
Old 11-17-2006, 04:06 PM
gsxr's Avatar
Unbanned...?
 
Join Date: Aug 2001
Location: USA
Posts: 8,033
Quote:
Originally Posted by DieselinBlood View Post
Thanks for all the replies. I worked on the car today checking linkages and vacum lines. I found some soot in the lines connected to the alda and blew them out.I took it out for a drive and the car still does 0 - 60 in 35sec. Right now I'm thinkin its the turbo. It starts right up and takes off with no hesitation to 30 mh .Then the acceleration slows right down.
Next week I'll take off the intake pipe and see if the turbo is free.If its free mybe the waste gate stuck. I'll post the results. Thanks, Jim
Try disconnecting the overboost protection for test purposes... there is a round sensor on the intake manifold, with a single wire connected. Unplug the wire, go for a test drive. See if there is any change in performance. When running correctly, your 35 second time should drop under 12 seconds.

__________________
Dave M.
Boise, ID

1997 E420 - 155kmi (Bugeyes)
1994 E420 - 145kmi (Blondie)
1993 500E - 193kmi (Lollipop)
1992 400E - 189kmi (Stinky Dirty)
Check out my website photos, documents, and movies!
Reply With Quote
  #14  
Old 11-20-2006, 03:09 PM
Registered User
 
Join Date: Nov 2006
Posts: 8
I took off the ALDA

I took off the Alda today after reading someother posts. What a difference. The car does 0-60 in 13 sec. It used to do 0-60 in 35 sec. Jim
Reply With Quote
  #15  
Old 11-20-2006, 03:39 PM
gsxr's Avatar
Unbanned...?
 
Join Date: Aug 2001
Location: USA
Posts: 8,033
35 seconds with an ALDA, and 13 seconds without, means the signal line to the ALDA was blocked. And also that the pump is WAY the heck out of spec.

On my white 1987 300D, with the ALDA installed but disconnected (no signal line), it went 0-60 in 14 seconds. With the ALDA line connected, it dropped to about 10.5 seconds. That's 3-4 seconds loss, not 20+....!!!


__________________
Dave M.
Boise, ID

1997 E420 - 155kmi (Bugeyes)
1994 E420 - 145kmi (Blondie)
1993 500E - 193kmi (Lollipop)
1992 400E - 189kmi (Stinky Dirty)
Check out my website photos, documents, and movies!
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 07:10 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