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 04-27-2008, 02:04 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
85 W126 300SD Wont Start!

I just bought an 85 300SD. The guy that sold it to me said that it had a ploblem starting. He said that he had, that day, towed it from the mechanic shop. Sure enough it started right up, idled good, and I took it on a test drive and it ran smooth. The next morning 7am i tried starting it and it wouldn't. Naturaly I assumed that it was the glow plugs....I replaced them all. It will start when the outside temperature is warmer but not early in the morning. I tested all the old glow plugs and only one of them was bad. I have power to all G.P. and I tested the new ones to make sure that I was getting ground from the engine to the G.P.....so i know that the glow plugs are working. I can hear the glow plug relay switch off after about 30 seconds. The guy replaced the old battery a month ago and I tested it today and it held 12Volts fine. It has 230,000 with a working odometer and other than the bad starting, is in really good condition. It has the oxidizer trap and some blow by. I have seen more blow by in other engines and they run fine. What could possibly be the problem with this car!!!!??? Thanks, Stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #2  
Old 04-27-2008, 02:06 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
one more thing

I checked all the fuses and they are all working.
-Stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #3  
Old 04-27-2008, 02:42 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,861
Air getting into the fuel lines? Have you checked all hoses and fuel filters and the tank strainer?

Have you checked for voltage AT the glowplugs themselves?
__________________
-diesel is not just a fuel, its a way of life-
'89 420SEL 168k - mine (OC-170,000)
'93 190D 2.2 - 223k - mine (OC-222,700)
'01 E320 Wagon - 149k - mine (OC-154,000)
'05 C240 4matic Wagon - 153k - wifes (OC-154,500)
'01 E320 - 162k - Dad's (OC-163,500)
'07 E350 Wagon - 116k - dad's (OC-121,500)
'02 E320 - 193k - Brother's (OC - 192,000)
'09 E350 4matic Sedan - 84k - Brothers (OC-85,500)
Reply With Quote
  #4  
Old 04-27-2008, 02:47 PM
Motorhead's Avatar
Registered User
 
Join Date: Dec 2002
Location: Ca.
Posts: 971
I would recommend adjusting the valves. I have found that the turbo engines' intake valves tighten up. Valve adj makes a big difference in starting.
__________________
My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.
Reply With Quote
  #5  
Old 04-27-2008, 03:34 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
fuel?

Quote:
Originally Posted by pawoSD View Post
Air getting into the fuel lines? Have you checked all hoses and fuel filters and the tank strainer?

Have you checked for voltage AT the glowplugs themselves?
I used the fuel primer and I could feel the fuel running through...a big difference when pumping air. If i can use the primer to get fuel I assume the IP is doing its job.
Again...When i get it started she runs fine smooth idle, no rough idling or missing.
-Stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #6  
Old 04-27-2008, 03:44 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
I dont see how adjusting the valves would do anything. The car runs fine once it starts. Once it starts it immediatly finds a nice idle speed and on the road it accelerates fine and shifts fine. If it were the valves when the engine does start and is not at temperature it would idle rough right? This is why I feel that is an electracal problem I have not checked the voltage @ the glow plugs as I dont have an voltmeter. The big fuse for the glow plug relay is obviously new and unbroken. If i am getting power at the glow plugs..with new glow plugs...they should be glowing red hot. If i was not gett ing 12 volts at the g. p., what would be the cause? thanks, stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #7  
Old 04-27-2008, 03:47 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,861
Does it crank very fast? If it cranks too slow it will not start well. Could be a worn out starter....
__________________
-diesel is not just a fuel, its a way of life-
'89 420SEL 168k - mine (OC-170,000)
'93 190D 2.2 - 223k - mine (OC-222,700)
'01 E320 Wagon - 149k - mine (OC-154,000)
'05 C240 4matic Wagon - 153k - wifes (OC-154,500)
'01 E320 - 162k - Dad's (OC-163,500)
'07 E350 Wagon - 116k - dad's (OC-121,500)
'02 E320 - 193k - Brother's (OC - 192,000)
'09 E350 4matic Sedan - 84k - Brothers (OC-85,500)
Reply With Quote
  #8  
Old 04-27-2008, 03:56 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
it cranks ok

It seems to crank about average. Not to fast but not to slow. Again remember. It only has this problem when it cold in the morning...once it warms up, it takes a couple cranks to start it but it starts. Now that you mention the starter, it seems to stick a little once I let off the ignition key.
-stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #9  
Old 04-27-2008, 05:12 PM
mechmagcn's Avatar
Just another diesel junky
 
Join Date: Aug 2002
Location: Mt Holly AR
Posts: 290
Quote:
Originally Posted by stephenc03 View Post
it seems to stick a little once I let off the ignition key.
-stephen
That sounds like low voltage, load check the battery and check your battery ground cable.
__________________
1971 R600 Mack toterhome (SuperDawg)
99 NU-WA Snowbird 34+2 SE 102 5er
If it's not diesel, it's not in my stable!
53 F100 617.951/auto
95 Dodge 3500 Cummins/5 speed service truck
Reply With Quote
  #10  
Old 04-27-2008, 05:14 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 14,861
If by "sticking" you mean the engine is dragging the starter, then its the starter bendix....one of ours did that for a while, then the whole starter died...and we replaced it.
__________________
-diesel is not just a fuel, its a way of life-
'89 420SEL 168k - mine (OC-170,000)
'93 190D 2.2 - 223k - mine (OC-222,700)
'01 E320 Wagon - 149k - mine (OC-154,000)
'05 C240 4matic Wagon - 153k - wifes (OC-154,500)
'01 E320 - 162k - Dad's (OC-163,500)
'07 E350 Wagon - 116k - dad's (OC-121,500)
'02 E320 - 193k - Brother's (OC - 192,000)
'09 E350 4matic Sedan - 84k - Brothers (OC-85,500)
Reply With Quote
  #11  
Old 04-27-2008, 05:15 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by stephenc03 View Post
I have power to all G.P. and I tested the new ones to make sure that I was getting ground from the engine to the G.P.....so i know that the glow plugs are working.
Quote:
Originally Posted by stephenc03 View Post
I have not checked the voltage @ the glow plugs as I dont have an voltmeter.




............so, what's the real situation..........??
Reply With Quote
  #12  
Old 04-27-2008, 05:35 PM
bgkast's Avatar
Rollin' on 16s
 
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
If it will not start after sitting intermittently it sounds like an air leak to me.
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
Reply With Quote
  #13  
Old 04-27-2008, 06:02 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
discrepancy revieled

Quote:
Originally Posted by Brian Carlton View Post
............so, what's the real situation..........??
when I had the old G.P. out I took a wire connected it to ground and power to see if they would glow red hot. However I did not check how much power I was getting out of the wireharness that connect to the G.P.s
-Stephen
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #14  
Old 04-27-2008, 06:04 PM
Registered User
 
Join Date: Jan 2006
Posts: 225
The issue is COLD VS. WARMER

Quote:
Originally Posted by mechmagcn View Post
That sounds like low voltage, load check the battery and check your battery ground cable.
As I said before...i load checked the battery...its a new battery so that is not surpriseing....it held 12 volts fine. I will check the ground cable. What explains the NOT starting when it is COLD and starting when it is WARMER?
__________________
68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual
Reply With Quote
  #15  
Old 04-27-2008, 07:20 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by stephenc03 View Post
when I had the old G.P. out I took a wire connected it to ground and power to see if they would glow red hot. However I did not check how much power I was getting out of the wireharness that connect to the G.P.s
-Stephen
I think that you've got to confirm that you have 12V at one of the glow plugs before we go any further with more complex problems.
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 04:42 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page