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#1
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Problem with my 126. Can you help?
Aloha from Hawaii,
I have two 300SD's... a 1980 (W116) and a 1982 (W126). I have run both cars with no modifications on 100% biodiesel (my own home brew) for just over 3 years. The 116 has performed without incident (have changed fuel filters a few times). The 126 has also run pretty well, until recently. It idles and drives well for about 15 minutes, and then sputters and dies. Thinking that there was an obstruction in the fuel line, I disconnected the fuel line coming from the fuel tank at the engine compartment, blew it out with compressed air, and reconnected the fuel line. The car would start right up, but then sputter 15 minutes later and die. Believeing that maybe some of my fuel hoses were deteriorating from the inside, I emptied the fuel tank and changed everything... both hoses at the tank (including a new tank screen), both hoses in the engine compartment, new fuel filter, and all of the injector return lines. I primed the engine, started it right up, and let it idle. About 15 minutes later... it sputtered and died. Does anyone have a diagnosis? Thanks in advance
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Ray 1980 300SD (Anthrcite Gray) 253,108 miles 1982 300SD (Silver Blue) 242,398 miles 1982 300SD (Black) 263,185 miles |
#2
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Try running it on a separate container of fuel hooked up to the feed and return lines in the engine compartment. Those symptoms are typical of a plugged tank vent stopping the flow of fuel and possibly a plugged tank screen. Running it on a separate fuel supply could confirm or deny a tank problem.
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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 |
#3
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Tank screen has already been replaced. Just to rule out all possibilities, run it with the fuel cap off the tank just for grins. If it doesn't die, then it's pulling a vacuum on the fuel tank and the vent line is plugged.
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![]() ~Michael S.~ Past cars: 1986 300SDL 1987 300SDL 1982 240D 1982 300SD Current: 1987 300SDL |
#4
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Well what's left, IP and Injectors
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) |
#5
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Quote:
You can also just remove the fuel tank cap allowing the fuel fill pipe to act as the tank vent. |
#6
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Quote:
Could this explain why my tank always has pressure built up in it? Where might the vent be??? I'm guessing "Elegant Madame's vent" might be plugged.
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daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior No longer selling Cluster Needles Paint No longer selling New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more |
#7
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Quote:
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83 SD 84 CD |
#8
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Faulty Primer Pump
Would a faulty/inoperative primer pump explain the problem?
Thanks
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Ray 1980 300SD (Anthrcite Gray) 253,108 miles 1982 300SD (Silver Blue) 242,398 miles 1982 300SD (Black) 263,185 miles |
#9
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Quote:
sorry for hijacking the thread.....
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daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior No longer selling Cluster Needles Paint No longer selling New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more |
#10
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the red text in the quoted response tells you where to look. drivers rear wheelwell, bell shaped contraption. probably covered with gook...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!! ![]() 1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#11
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blind as a bat ???
Thanks for pointing that out.....see what happens when the answers are intermingled with the questions? I completely missed it. Going to do that tomorrow night as soon as the kids are in bed.
Thanks!!!
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daw_two Germantown, TN Links: Sold last car --- 05/2012 1984 300D Light Ivory, Red interior No longer selling Cluster Needles Paint No longer selling New Old Stock (NOS) parts Past: 3/2008 1986 300SDL "Coda" 04/2010 1965 190D(c) "Ben" & many more |
#12
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You can remove the fuel tank fuel (gas) cap to test if the tank vent is plugged. If it runs OK without the cap on you will know that the fuel tank vent has a problem.
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#13
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I had this same problem with my 123. I came home late one night, and when I got out of the car I could hear this real faint air sucking sound near the L/R tire. looked under the car, and little bell shaped vent was making the noise.
The next day got under the car and cleaned out the dirt etc... has woked fine ever since. I think there is also a check valve between it and the metal line. Had the same problem with my 82 Datsun Diesel pu. the tank would be pressurised when I removed the cap. removed the check valve and all fixed. Charlie
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there were three HP ratings on the OM616... 1) Not much power 2) Even less power 3) Not nearly enough power!! 240D w/auto Anyone that thinks a 240D is slow drives too fast. 80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works |
#14
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Quote:
Good Luck DK
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1983 300sd 253,000 + 13,000 (10,000+ on veggie and biodiesel)= 266,000 1983 300sd 390,000 (Leaky windshield seal) Known to me as the shower car. Parts car now! 1 junk 300sd Watch out for the skunk that lives underneith it! |
#15
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I try to remember to use a different color type and bold also, the better to stick out you understand.
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83 SD 84 CD |
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