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  #1  
Old 04-11-2007, 02:58 PM
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Question Black vacume hose under dash

I have a n 84 300SD, I was pulling wires under the dash throught the firewall and I found a Black Vacume Hose with nothing attached to the end under the dash. The other end attaches to the square metal device on the rear of the injection pump. Where is the end under the dash supposed to attach to?
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  #2  
Old 04-11-2007, 03:00 PM
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your ignition key cylinder. it turns off the fuel to the motor when you turn off the key.
there should be another hose there also, it goes to the vacuum source in the engine compartment.

John
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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:
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  #3  
Old 04-11-2007, 03:03 PM
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mmmmmm Diesel...
 
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Sounds like a vent line
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  #4  
Old 04-11-2007, 03:06 PM
Craig
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Quote:
Originally Posted by rrgrassi View Post
Sounds like a vent line
The black line is a vent, it is supposed to be opened under the dash (the "fuel cutoff" line to the ignition switch is brown). It's OK as is, leave it alone.
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  #5  
Old 04-11-2007, 03:10 PM
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vent huh? ok, I learned something again... still slowly though. on my TD the lines are black, and the brown line connects to the black line just before it goes through the firewall.
neato.
John
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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 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 04-11-2007, 03:14 PM
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Funny, I always thought that black line lead to the search option...
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  #7  
Old 04-11-2007, 03:17 PM
Craig
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If you look at this diagram, the black (sw) line going to "b" is the vent line we're talking about:

http://home.comcast.net/~phantoms/vacuum/engine.jpg
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