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#1
07-30-2007, 06:09 PM
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Lost Vacuum Tube Connection
I INSTALLED A NEW VACUUM CONTROL VALVE (TRANS VACUUM MODULATION VALVE). THE BLACK TUBE FROM BOTTOM OF THE VALVE THAT LEADS TO THE FIRE WALL PULLED OUT AND I CAN NOT FIND A PLACE FOR IT TO GO. THE FACTORY DRAWING SHOWS ONLY (a vent to passenger compartment). CAN ANYONE HELP WITH THE LOCATION FOR THE TUBE AND PURPOSE ??? THANKS
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#2
07-31-2007, 02:02 AM
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The vacuum control valve "leaks" air into the transmission vacuum line as means of reducing the vacuum level. The black vent line was routed through the firewall so that the VCV would have a relatively clean source of air from the cabin. The vent line normally protrudes slightly through the firewall and does not connect to anything.
On some models, the EGR vacuum line also utilizes the vent line when it "dumps" vacuum at full throttle.
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#3
07-31-2007, 10:15 AM
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[QUOTE=MARV9827;1578177I CAN ANYONE HELP WITH THE LOCATION FOR THE TUBE AND PURPOSE ??? THANKS[/QUOTE]
Welcome too the forum but no need to shout, most hear just fine around here 
__________________
 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#4
07-31-2007, 11:56 AM
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What car?
If you put the year and model of your Benz in your signature then we won't have to ask "which car?" every time. Click on "User CP" to do that.
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 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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