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Old 05-02-2001, 09:35 AM
steve hutson
Posts: n/a
While relpacing the cruise amp on the 87 300TDT, I had the pad under the steering wheel removed and I noticed a vacuum line loose right next to the ignition (to the right). Checked the two lines going into the switch itself, but they were both there. This loose line has a rubber fitting on it, so I figure that it goes somewhere really close by.
A/C, door locks, glow system, shifting, all works, but I figure that this line isn't just hanging out for no reason.
The line is brown or black, and the connector is black. Any takers?
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Old 05-02-2001, 12:32 PM
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On my 82 sedan, there is a black line under the dash and It is also not connected. I am told the black line under dash on driver's side is there to vent the system and is not intended to be attached. I hope this helps.

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Old 05-02-2001, 03:57 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Yes, the proportioning valve on the back of the injection pump (or side of injection pump in the 603 case)is a controlled leak. It might not be good to suck air from the area under the hood (dirt, oil, rain, etc., etc.). They ran the leak line into the dash to pull clean air.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 05-04-2001, 09:18 AM
steve hutson
Posts: n/a
Many Thanks
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