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Old 05-07-2011, 10:25 AM
ivandrocco's Avatar
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Join Date: Mar 2010
Location: Amherst, MA
Posts: 243
vacuum lines - 300cd

Trying to figure out what is up with my vacuum lines- i've read the stickies and searched but some aspects aren't clear.

Attached is Samuel Ross's photo with the text and arrows. The other photos are my mess.

Some of this might be coupe specific? Let's start with what I know.

Two main lines draw off the vacuum line to the brake booster. The first attaches to a three way connector, one direction going to the egr/vac switch on top of the valve cover, the other to a second three way connector that connects to the green valve and a line to the transmission. I eliminated the switch on top of the valve cover and replaced the double 3-way connector system with a single three way connector.

The other line from the restricted orifice closer to the brake booster supplies the accessories via a 4-way connector. This was a mess when I got the car.

-3-way check valve splits vacuum between yellow line w/ grey stripe (reservoir) and a plain yellow line (door locks).

-Second yellow valve connects to blue vac line (seat backs).

-Green vac line (climate control)

-Brown vac line (ignition/shutoff)

In addition to these lines, there is a brown vac line w/ blue stripe that goes down to the IP? and a black vac line that connects under the green valve.

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In Samuel Ross's image, the yellow three way valve is connected to a three way connector that supplies the reservoir and door locks, with the other orifice connecting a black vac line for the cruise control. My lines didn't come set up this wa

I want to isolate all of the accessories. Does that mean I can just leave everything disconnected and unplugged except for the brown vac line? Are the brown w/blue stripe and black lines routed correctly?
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