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  #1  
Old 07-05-2007, 10:04 PM
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1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
617 300SD starts/dies...why?

Here's some back ground--Monday the SD drove fine, no problems. Tuesday the SD started up fine , pulled out of my driveway got 50 feet engine dies, restart, move 15 feet, engine dies. I have to start/restart a couple of times to get back in driveway. Tuesday night I changed both filters thinking maybe something plugged one up, still has the same symtoms. Tonight I hook up a bottle of diesel like I was going to do a purge on it, runs a little then dies, I keep restarting (~4 or 5 times) until it seems like it will only get to an idle and then it dies. So I think I have eliminated clogged filters and a clogged tank screen. Now my questions are - what is going on and what do I need to check next. Thanks.
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If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #2  
Old 07-05-2007, 10:18 PM
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Shut off diaphragm malfunctioning? Try unplugging the vacuum line from the shut off and see if the situation improves.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #3  
Old 07-05-2007, 10:38 PM
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Fuel pump on the way out?

See how much fuel you get by cranking for 10 seconds. Run the output of the pump into a container.
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  #4  
Old 07-05-2007, 10:49 PM
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1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
Thanks kerry edwards, I just went out and tried that, nope no change. This seems to have happened overnight, MB diesel grimlins showed up I guess.
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #5  
Old 07-05-2007, 10:52 PM
crashone's Avatar
1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
Brian, just saw your post, please elaborate. I will try that tomorrow. I was wondering about the fuel pump, would these be the symtoms?
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #6  
Old 07-05-2007, 10:54 PM
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Try Brian's suggestion, then try an alternative fuel supply in a coke bottle led directly to the primary filter to eliminate air leaks between tank and filter as the source of the problem.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #7  
Old 07-05-2007, 10:56 PM
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Quote:
Originally Posted by crashone View Post
Brian, just saw your post, please elaborate. I will try that tomorrow. I was wondering about the fuel pump, would these be the symtoms?
Run the output from the fuel pump into a container and crank the engine for 10 seconds. You should get about 2 ounces of fuel. If you don't, the pump is suspect. A proper test for fuel pressure is the only sure confirmation.
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  #8  
Old 07-05-2007, 10:58 PM
crashone's Avatar
1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
"then try an alternative fuel supply in a coke bottle led directly to the primary filter "

I did this, that's how I eliminated the clogged tank screen part. Yes tomorrow evening I will try Brian's suggestion. Thank you for the help.
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #9  
Old 07-05-2007, 11:03 PM
crashone's Avatar
1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
Brian earlier today when I did the bottle of diesel trick (like a purge set up) I thought the out flow seemed weak. I thought the out flow would have a little more force to it.
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #10  
Old 07-05-2007, 11:07 PM
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Quote:
Originally Posted by crashone View Post
Brian earlier today when I did the bottle of diesel trick (like a purge set up) I thought the out flow seemed weak. I thought the out flow would have a little more force to it.
You should have a very strong flow from the return line into the bottle.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #11  
Old 07-05-2007, 11:11 PM
crashone's Avatar
1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
Ahhh we are getting somewhere!! The flow was very weak, in fact I wondered how people could suck a bottle dry as fast as they have reported. I had a fuel pump go out on my truck that was from one start to the next. Thanks again.
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
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  #12  
Old 07-05-2007, 11:29 PM
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Quote:
Originally Posted by crashone View Post
Brian earlier today when I did the bottle of diesel trick (like a purge set up) I thought the out flow seemed weak. I thought the out flow would have a little more force to it.
Test the fuel pump as I advised above. Report back.
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  #13  
Old 07-06-2007, 01:05 PM
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primer pump might be leaking and air is suck in instead of fuel
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  #14  
Old 07-06-2007, 09:34 PM
crashone's Avatar
1983 300SD, 4 speeed
 
Join Date: Jul 2006
Location: Raleighish, NC
Posts: 664
Well I guess a teaspoon or so doesn't add up to a couple of ounces after 10 seconds or so. I went ahead and pulled the fuel pump. I think might go snag one tomorrow at the boneyard so I can be sure before spending the big bucks on a new pump. Is there any way to rebuild one of these? Thanks.
__________________
If it ain't broke take it apart and find out why.

1983 300SD, 4 speed
1994 C280
1987 300TD wagon
1996 HD Road King

Ride in Peace Eric Peterson, Harley of Macon
Reply With Quote
  #15  
Old 07-06-2007, 11:04 PM
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Location: Blue Point, NY
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Quote:
Originally Posted by crashone View Post
Well I guess a teaspoon or so doesn't add up to a couple of ounces after 10 seconds or so. I went ahead and pulled the fuel pump. I think might go snag one tomorrow at the boneyard so I can be sure before spending the big bucks on a new pump. Is there any way to rebuild one of these? Thanks.
Yep, a teaspoon won't keep that engine running. A new pump should solve the problem.

Not sure on a rebuild..........haven't heard of anyone doing that..........
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