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  #1  
Old 02-27-2006, 11:09 PM
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Join Date: Feb 2006
Location: joshua tree
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first day, stranded!! lift pump? 300sd

My wife was driving home her new 79 300sd today, 130 miles from LA. It has at least a million miles on it, well over 200,000 with a broken odometer. I tried to talk her into a 190d "I'd be killed", a 300d "waspy", 300sd " thats what JR drives!"

So anyways it died, 25 miles from home, it's too long and low for my short ramped trailer i use for my bobcat. I tried. Alot.

I had her crank it over as I losened the banjo bolt on the top of the fuel filter. No fuel. I put 5 gallons in, still no fuel. I didn't try the "primer pump" as it was my first look into a broken mercedes, in the rain, in the windiest place on earth, yank it ? pull it ? I didn't figure it out, it was hell.

On my dodge w/cummins I replaced my mechanical lift pump with an electric one, because it's always breakin' and replaced the mechanical lift pump on my bobcat w/perkins because the parts no longer exist.

Should I replace the bosch pump too? over $200?!! In line pump , $50.
Anyways the car is stuck on the side of the road, not even the dealer an hour away has the part in stock. Could it not be the pump? A mouse in the line?
I've got to move the car in the morning.

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  #2  
Old 02-27-2006, 11:22 PM
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Location: Blue Point, NY
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Quote:
Originally Posted by buck moberly
My wife......








No fuel.
.........ahem......

If it were me........I'd fill the tank to the brim so that the pump gets immediate fuel. Then, I'd fill the secondary with fuel. Then, I'd pump that primer pump handle about 100 times.

Then, I'd crack the injector lines, get in, and crank it for 15 seconds. Check to see if you have fuel dripping out of the lines. If so, then tighten the cap nuts. If not, crank it again for 15 seconds. By now, you "should" have fuel at the cracked injector lines. Tighten them up and start it.



Otherwise, the fuel pump is a possibility.........but, I can't remember when someone reported the last fuel pump failure. It's very rare.
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  #3  
Old 02-27-2006, 11:52 PM
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Location: joshua tree
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After putting in 5 gallons of fuel, it should be pretty full after only 100 miles. After cranking it over until the battery was almost dead and i didn't see a drop of fuel from the banjo bolt on top of the fuel filter, is that location wrong for checking for fuel in this car?
It's raining now so I've got to go back to hidding under the bed.
In the morning I'll go down to were the car is and if it's still there I'll try your suggestions, then try the inline pump from my bobcat.
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1993 w250 Dodge cummins,wvo,tweaked pump,etc
1969 Baja bug, vert, 3x3, mid travel, 1914, fun
1979 300sd not so bad
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  #4  
Old 02-28-2006, 12:01 AM
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Quote:
Originally Posted by buck moberly
After putting in 5 gallons of fuel, it should be pretty full after only 100 miles.
I'm not understanding this statement.

You need enough fuel in the tank so that the fuel flows to the fuel pump via gravity.

Then, you need to follow the steps that I mentioned above.

If you run a diesel completely out of fuel, you can crank it for five hours and never start it, with a fully functional fuel pump, unless you follow specific procedures.

No sense changing the pump if it simply ran out of fuel.

Now, if you are positive that there was sufficient fuel in the tank when it shutdown, then, yes, the symptoms point to the fuel pump.

If so, the pump must be changed and the procedures, as mentioned above, still must be followed if you expect to start it.
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  #5  
Old 02-28-2006, 12:02 AM
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Sounds like air leak or gunk/algae clogging the tank screen. Try blowing back thru the fuel line to push some gunk from the tank screen and then prime the fuel line with a mighty vac. plumbed to a bottle of diesel. Reattach line, prime filters if need be and then try to fire her up.

Better yet after blowing back into the tank install a temporary $30 Faucet/Purlator 12v fuel pump back by the tank. This will prime the fuel line as well as assit with resolving air leak issues. (no suction no air leaks)
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"If anyone knows other lessons I need to learn, please tell me. I'm tired of learning them the hard way".
by JerryBro


The Glow Plug Wait: This waiting period is a moment of silence to pay honor to Rudolph Diesel. The longer you own your diesel the more honor you will give him". by SD Blue

My normal daily life; either SNAFUed- Situation Normal... All Fouled Up, or FUBARed- Fouled Up Beyond All Repair

62 UNIMOG Camper w/617 Turbo, 85 300SD daily driver- both powered by blended UCO fuels
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  #6  
Old 02-28-2006, 12:32 AM
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I put 5 gallons into a tank filled 100 miles before.sorry.
I had the bolt on top of the fuel filter lose, just looking for fuel. I didn't expect to prime it this that way, just looking for some fuel.
The tank algee bloom theory, hmm, could they work for me somehow? Can i burn them?
I'll be up early trying all your suggestions. If i cann't get it to run how can i turn up the "alda", fabricate intercoolers, waste money hand over foot.

I'll look for a manual in the morning ...;
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1993 w250 Dodge cummins,wvo,tweaked pump,etc
1969 Baja bug, vert, 3x3, mid travel, 1914, fun
1979 300sd not so bad
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  #7  
Old 02-28-2006, 12:38 AM
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Quote:
Originally Posted by buck moberly
I put 5 gallons into a tank filled 100 miles before.
Well, that's a completely different deal.

So, the tank was only down by 5 gallons or so.......and you filled it.........correct?

Take off the line to the primary filter........see if you have flow. Fuel should flow from the tank in a steady stream. If it does.......the tank screen is fine. If it does not, then you definitely have a problem with the screen and you should blow air back through the line to clear the screen as a temporary measure.

If you have fuel and the engine ran the secondary completely out of fuel, the odds of the fuel pump gone bad are getting higher by the minute.......all of the procedures that I stated above.........won't work.........if the fuel pump is NFG.
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  #8  
Old 02-28-2006, 09:16 AM
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If it were me, I'd get a large soda bottle, fill it with diesel, make a hole in the cap just large enough to pass a fuel line thru, disconnect the tank line at the primary fuel filter, hook up the bottle line in it's place and see if it can pull fuel from the bottle. If so, I'd wire the bottle in the engine compartment, drive home and look into plugged fuel lines at my leisure.
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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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  #9  
Old 02-28-2006, 09:51 PM
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Well I got the car home.
I took an air compressor with me and blew 125psi into what turned out to be a clogged line or screen. Algee? It started up after I bled it.
Thanks.
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first day, stranded!! lift pump? 300sd-3sd.jpg  
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1993 w250 Dodge cummins,wvo,tweaked pump,etc
1969 Baja bug, vert, 3x3, mid travel, 1914, fun
1979 300sd not so bad
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  #10  
Old 02-28-2006, 09:53 PM
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Quote:
Originally Posted by buck moberly
Well I got the car home.
I took an air compressor with me and blew 125psi into what turned out to be a clogged line or screen. Algee? It started up after I bled it.
Thanks.
Good job.

The screen needs a 46 mm socket (or 1 13/16). You need to drain all the fuel from the hoses beneath the screen prior to dropping it. Normally they can be cleaned. A new one is about $17. from the dealer.

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