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#1
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still will not shut off.....
I have finally narrowed my shutoff problem down to the where the valve on the injection pump. The valve is stuck....I can get it to shut off with the mitey-vac but it takes 30-40 lb of pressure and it does hold the pressure which leads me to think that a simple cleaning is all it needs.....I cannot get it off however. I have the ALDA removed to get to the rear nut(found out the ALDA is shot in the process) and it is stuck under a plastic unit to the front engine side of it. Two wires come out of the plastic unit and it has a screw similar to the headlight deal....I am not sure how to take the plastic piece off and cannot find it in the online service manual any help would be appreciated and If you need pics I will get them tomorrow....Thank you
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Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#2
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The shutoff valve will only go to 29 inches of HG, not pressure. I am sure this is what you ment. Are you saying that it wont shut off untill it gets to 29 HG? Can you hear it bind. There is a small wire rod inside that connects to the fuel rack.
Post some pics.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#3
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oops
30-40 hg....sorry
I tried it 3 times and it shut off at 32, 37, and 41ish....
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Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#4
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I am confused. A vacuum guage wll only go to 30 inches. That is the theorical "perfect" vacuum.
Are you using a Mity Mite or something? In my testing on shutoff valves, the shutoff should actuate at about 7 inches HG. It actually starts to close at 5 inches but full shutoff will happen at only 7 inches.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#5
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Something doesn't make sense, about 30 inches of Hg is a "full vacuum" (0 psia) so you can not get any higher vacuums. The vacuum pump in the car provides around 20 inches, or so. Are you saying that the vacuum provided from the vacuum pump is not sufficient to shut off the valve?
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#6
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The circuit that the shutoff valve is on does not receive a 29 inches full vacuum. The valve only needs 7 inches of vacuum to work. I hooked up a vacuum guage in series once when I was troubleshooting the system and was amazed at how little vacuum a fully functioning shut off valve needs.
Yes 0 inches of vacuum is 14.7 psia and 29.95 inches of vacuum is 0 psia or void of atsmosphere.
__________________
1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#7
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I'm going to have to run over to the shop I borrowed the guage from and see wtf I'm really saying before I say it....I am not sure of the measurements (lbs/hg/etc..) It is a snap on vacuum tester if that helps.....as far as the #s that is what I got.....I apologize for not having my ducks in a row before posting...
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Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#8
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No problem. Look at the pictorial and it may help you.
http://dieselgiant.com/mercedesvacuumtroubleshooting.htm
__________________
1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#9
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Quote:
__________________
Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#10
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Here is what the valve looks like to give you an idea.
__________________
1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#11
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The guage I used was 0-50 and you have a switch that was vacuum/pressure. I'll check tomorrow..Thank you
__________________
Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#12
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Quote:
__________________
Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
#13
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It may may a difference that he's not talking about a 617. I don't know how different the shut off is on an 87.
__________________
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 |
#14
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The photo...
The problem I am having is getting the plastic piece ( to the left ) off. Notice that the piece overlaps the shutoff valve.
http://pg.photos.yahoo.com/ph/ocgroshart/album?.dir=8434
__________________
Owen 87 300TD 603 I-6 94 Jeep XJ I-6 4.0 (see the pattern) 89 750il seventy-two hundred feet above sea level (kinda cold up here) |
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