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 09-13-2008, 01:22 AM
Registered User
 
Join Date: Sep 2008
Location: SW Pennsylvania - about 40 mi SSE of steel town usa
Posts: 40
My new (to me) 300TD - many questions

I just drove my wagon home 250 miles and it drove very nice...except for a few issues. First, the idle is rough, I think. It makes the car wobble at the red light. It has new motor mounts, so I don't think that is it. By the tach, it is idling at 5-600 rpm. Seems like that could be it. Also, it is shifting 1-2-3 very quick, and hard. is the bowden cable the likely culprit? Also, on the ride home, the high beams worked for a while then just quit, in fact, when I turned them on, the lights went out altogether, even the low beam. Finally, the cruise doesn't work and neither do the power locks. I assume it is vaccuum related, and that this could be the prob with the shift too?

Reply With Quote
  #2  
Old 09-13-2008, 01:26 AM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Welcome to a fellow wagon owner, and congrats on your purchase. Also, bless you for not incorrectly referring to it as a 300TDT. What year is your wagon? Makes a difference on some of your question.
Your idle is a bit low. Usually about 650-700 I think.
Buy you a Mityvac and get ready to dig in to the vac system. You will be there often.
__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Last edited by JimmyL; 09-13-2008 at 12:59 PM.
Reply With Quote
  #3  
Old 09-13-2008, 01:31 AM
TylerH860's Avatar
KHAAAAAAN-gress
 
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,187
The guy knows alot more than me when I started one year ago.

I take it this isn't your first rodeo? (in the MB diesel world)
__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
Reply With Quote
  #4  
Old 09-13-2008, 01:32 AM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,394
The hard shifts and the door locks are both due to a failure in the vacuum system. You probably have a broken rotted, or disconnected vacuum line somewhere. As Jimmy says, you need a MityVac and a copy of the vacuum diagram from one of the links at the top of the page. It is a slow process to trace through the whole thing but that's what you need to do.
__________________

"Buster" in the '95

Our all-biodiesel family
1995 E300D (W124) . .239,000 miles My car
1996 E300D (W210) . .313,000 miles Wife's car
Santa Rosa population 170,685 (2012)
Total. . . . . . . . . . . . 722,685
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #5  
Old 09-13-2008, 01:43 AM
Biodiesel300TD's Avatar
|3iodiesel300T|)
 
Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
The rough idle could be two things. You said your idle is between 500 and 600. It should be up around 750. There is an adjustment you can make to raise the idle speed. Its on the passenger side of the injection pump. Between the pump and the block. You'll need a 14mm deep socket to loosen the lock nut, then there is a screw on the top that you can adjust the idle speed with. Then retighten the lock nut. The second option is the rack damper bolt. It may need some adjusting. Or may need to be replaced. I would raise the idle first and see what happens.

Your quick 1-2-3 shifts are caused by an improperly adjusted bowden cable as you said. I can't remember which way is needs to be adjusted, but I think you need to screw the adjusting screw out to make the shifts later. Turn it a 1/4 turn or so at a time then drive the car. And keep adjusting until the shift points are a little to your liking.

Sounds like your head light issue could be in the combination switch you use for turn signals and brights. I had one once that would turn the lights off when you turned the signal for a right turn. I would play with that a little, try turning the lights on then try switching to brights slowly and see if the lights cut out.

Depending on the year the cruise could the a vac problem or a cruise amp problem. It's really rare that cruise works on these cars.

The door lock issues are vacuum related. You probably have a leaky actuator in one of your doors, a bad connector, or the pump isn't pumping enough. Like stated before you'll want a mity vac to troubleshoot the vac system.
__________________
Andrew
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
Reply With Quote
  #6  
Old 09-13-2008, 02:04 AM
Registered User
 
Join Date: Sep 2008
Location: SW Pennsylvania - about 40 mi SSE of steel town usa
Posts: 40
Well,
I have a mityvac already, which is a good thing i guess. I really don't know my you know what from a hole in the ground when it comes to these cars though. Its my first mercedes and my first diesel anything. I kind of had done some reading on this site and others which allowed me to at least ask a question that was better than super generic. Thanks for the prompt replies. I am so excited, I almost want to head out there right now 12:59 est and work on it. I guess I'll try the idle first since it seems so low.

I forgot to mention that the odo works, but only intermittently.

I am not really afraid of any of this stuff though, since it runs so great on the highway. One other thing, how high will this thing rev. I felt like I was really abusing it to go 70 - maybe it just felt that way since I had a preconcieved notion that diesels were low rpm chuggers. It was at like 3100 at 75, give ot take a few revs. Does that sound about right.

Oh, and one last ?, I paid 2400, it is an 83 with 269xxx miles on it. Hopefully I didn't overpay by too much. Only one rust spot - drivers rear rocker, if that matters
Reply With Quote
  #7  
Old 09-13-2008, 02:35 AM
TylerH860's Avatar
KHAAAAAAN-gress
 
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,187
Your Rev levels are normal.
__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
Reply With Quote
  #8  
Old 09-13-2008, 02:40 AM
TylerH860's Avatar
KHAAAAAAN-gress
 
Join Date: Aug 2007
Location: Wichita, Ks
Posts: 5,187
Quote:
Originally Posted by cavalierz View Post

Oh, and one last ?, I paid 2400, it is an 83 with 269xxx miles on it. Hopefully I didn't overpay by too much. Only one rust spot - drivers rear rocker, if that matters
You did great for your first purchase, if the car runs down the road and the rear-end sits up nice and high. I slightly overpaid for my first one Ol' Turbo, and stole my wagon Norm.
__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
Reply With Quote
  #9  
Old 09-13-2008, 04:23 AM
dieselnutnj's Avatar
CQ DE W2ICA
 
Join Date: Jul 2008
Location: Newton NJ
Posts: 163
rough idle can be caused by a host of problems, ranging from a bad injector, to improper valve clearance to low compression in one or more cylinders. My wagon has done that wobble for years, it's a joke amongst my friends and I. Start with the basics, and check your valve adjustment. The clearances vanish over time. Amazing things happen when the adjustment is corrected.

Odo's.. common as the wind for problems. I have NEVER bought a Benz with a working ODO.. my latest.. a 190E.. needed surgery to fix it too. If your fairly handy.. you can remove the cluster, remove the speedo, and if you study it. .you will find a pot metal or brass gear that needs to be tightened back up on the shaft. I've actually slid the shaft out, and "nicked" the shaft to give it some friction.

Cruise on these... usually winds up being cracked connections in the cruise amp located up under the dash between the emergency brake and regular brake pedal. If your handy with a soldering iron.. have at it! I've found that if you take a tooth brush and acetone to the solder side of the board first and clean the coating off.. soldering is much easier. go one at a time, and take your time.

Door locks.. everyone who owns a Benz should have a mighty vac!!! It is as handy on these as a 10 mm wrench! The vacum system is not hard, and right under the floor mat on the psgr side will be a "t" connection that will allow you to isolate at least the front psgr side door and the rest of the system.. and then just in the area of the rear seat.. u guessed it.. another connector for the rear hatch, fuel door, and psgr doors. Make sure that it isnt as easy as the lines popped apart at any of those junctions. Use your mighty vac to check the diaghphrams in each door.

Hope it helps. Have a ball.. these are REALLY fun cars to work on!!!!!!!!!!!!!!!!!!

Rick
W2ICA
Reply With Quote
  #10  
Old 09-13-2008, 12:15 PM
Unofficial wormcan opener
 
Join Date: Dec 2005
Location: Ashland, MA
Posts: 2,602
Quote:
Originally Posted by JimmyL View Post
Welcome to a fellow wagon owner, and congrats on your purchase. Also, bless you for not incorrectly referring to is as a 300TDT. What year is your wagon? Makes a difference on some of your question.
Your idle is a bit low. Usually about 650-700 I think.
Buy you a Mityvac and get ready to dig in to the vac system. You will be there often.
I'll venture a guess on the year. It is not a 124, so '81-'85. How about 300TDt? Is that acceptable?
__________________
1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss
Reply With Quote
  #11  
Old 09-13-2008, 01:07 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
Quote:
Originally Posted by bio300tdtdriver View Post
how about 300tdt? Is that acceptable?:d
NO!!!




__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #12  
Old 09-13-2008, 01:27 PM
Biodiesel300TD's Avatar
|3iodiesel300T|)
 
Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
For those of you that may not understand Jimmy's irritation, let me explain. Starting in 1981 all the 3.0L diesel wagons that came to the US had turbos so calling any wagon from 1981 on a TDT is redundant. It is also redundant to call any 300D from 1982 on a DT. They are all turbos in the US from 82 on. And calling a sedan a 300TD because it is a turbo diesel is just out right wrong and offensive the the true TD owners.
__________________
Andrew
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
Reply With Quote
  #13  
Old 09-13-2008, 01:39 PM
Chad300tdt's Avatar
Benzless Scoutmaster
 
Join Date: May 2007
Location: North Wales, PA
Posts: 4,001
Quote:
Originally Posted by Biodiesel300TD View Post
For those of you that may not understand Jimmy's irritation, let me explain. Starting in 1981 all the 3.0L diesel wagons that came to the US had turbos so calling any wagon from 1981 on a TDT is redundant. It is also redundant to call any 300D from 1982 on a DT. They are all turbos in the US from 82 on. And calling a sedan a 300TD because it is a turbo diesel is just out right wrong and offensive the the true TD owners.
Agreed ... and on top of that, there are MANY threads archived here, where people were confused or gave incorrect advice because the OP was using an incorrect designation.

I am one of Jimmy's coverts. I too used to use the incorrect designations in an attempt to let everyone know I had a turbo. I now let my screen name stand as a reminder to myself of where I began and of Jimmy's "gentle" correction.

__________________
Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys
Reply With Quote
  #14  
Old 09-13-2008, 01:49 PM
JimmyL's Avatar
Rogue T Intolerant!!!
 
Join Date: May 2004
Location: Sunnyvale, Texas (DFW)
Posts: 9,673
OCD isn't just a disorder, it's a way of life......


__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
Reply With Quote
  #15  
Old 09-13-2008, 01:51 PM
Unofficial wormcan opener
 
Join Date: Dec 2005
Location: Ashland, MA
Posts: 2,602
Quote:
Originally Posted by Biodiesel300TD View Post
For those of you that may not understand Jimmy's irritation, let me explain. Starting in 1981 all the 3.0L diesel wagons that came to the US had turbos so calling any wagon from 1981 on a TDT is redundant. It is also redundant to call any 300D from 1982 on a DT. They are all turbos in the US from 82 on. And calling a sedan a 300TD because it is a turbo diesel is just out right wrong and offensive the the true TD owners.
Oh, I understand his irritation. I just think it borders on a neurosis. Just for your info the E300 diesel in '95-97 was not turbo charged. So not all diesels from MB were turbo charged after '82.

TDT is so widely used that it is accepted by some people north of Texas.

Now when you call a sedan a TD, that is just ignorant.


The opinions expressed above are not meant to annoy any forum members, well maybe Jimmy, but I like him.

__________________
1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss
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 06:24 PM.


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