Cannot Find Where Vacume Line Attaches - PeachParts Mercedes-Benz Forum

ejsharp · #1 12-02-2005, 04:15 PM

I just finished installing a starter on Wife's 1993 190E 2.3 and I have a stray vacuum line. It is black with a white stripe and it starts at a single male port that comes out of the top of the intake manifold. It is the only vacuum port located on the top side of the intake manifold. There is a "U" shaped rubber connector that directs a two foot vacuum line downward. The other end of the line was hanging unattached down next to the starter and it has a streight rubber connector on the end of it. I don't know if the vacuum line fell to that location and if it shoud be attached down there or somewhere else. I cannot find anything that it can be connected to.

I am hesitant to finish reconnecting the rest of the job... intake manifold mount etc before I find out where the line goes to.

I am near my wits end because I removed and installed the starter 3 times. Any help will be most appriciated.

The good new is that I got the starter working after 3 days of grief.

ejsharp · #2 12-03-2005, 12:31 PM

Would some kind soul with a 190E look under their air breather and tell me where the vacume line goes to... as described in the previous post.

May the saints in heaven reward you.

MikeTangas · #3 12-03-2005, 02:08 PM

Check the vacuum modulator on the transmission. Might be it got knocked/pulled loose.

Note: I have no experience with the 201.

ejsharp · #4 12-04-2005, 12:22 PM

Mike... thanks for that reply. I put everything back together again and pluged the end of the stray vacume line then test drove the car. It seems the car is shifting rapidly and hard. Not sure because weather was cold and I don't drive the car much since it's is wife's car.

I had checked the trans for a vacant vaccume port but could find nothing. I will check it again. Maybe the line has an in line connector that passes over the top of the transmission and is unpluged and out of sight.

I'll check to see if I have vaccume on whatever lines do go to the transmission.

Again thanks. Your halo is starting to glow.

MikeTangas · #5 12-04-2005, 12:32 PM

Not sure on your car, but on mine the vacuum modulator is on the left side of the tranny. Shift points being off point me toward the modulator also.

sbourg · #6 12-04-2005, 01:04 PM

Quote:

Originally Posted by ejsharp

I put everything back together again and pluged the end of the stray vacume line then test drove the car. It seems the car is shifting rapidly and hard. Not sure because weather was cold and I don't drive the car much since it's is wife's car.

This IS the indication of a disconnected or failed vacuum line to the modulator. Never tried to access ours, but it is on the upper part of the tranny, access difficult due to the driveline tunnel. May have to disconnect and drop the tranny mount for access.

Steve

ejsharp · #7 12-04-2005, 02:57 PM

Steve,
I checked out the line going through the tunnel and over the trans. There are two lines running parallel to each other. One is a cable and the other is a vacuum line. The vacuum line is black with a green stripe along the side. It is connected at the trans to the modulator. The other end is connected to what appears to be a solinoid that is mounted on the firewall. I sucked on the firewall end of the line and the line holds a vacuum so I assume there is no "Y" connector that is out of sight and inside the tunnel that my mystery vacuum line might connect to.
There is a second line comming from the solinoid that goes up behind the brake booster and is connected to some yellow pots. The vacuum for the green striped line comes from these pots and then goes to the solinoid on the firewall.

So it appears as though my mystery line... black with white stripe must be for something else... Unless I got the lines switched somehow during my struggles with the starter.

Possibly you could take a peek under the hood to see if indeed the green striped line comming from the trans mounts to the solinoid on the firewall.

Many thanks for your input.

ejsharp · #8 12-04-2005, 05:37 PM

I FOUND IT! I FOUND IT! i FOUND IT! I had been looking at another module on the other side of the transmission that also has a vaccume line going to it.

I could not see the modulator because it was up behind some harness. Plus the male connector on the moddulator was in a blind spot and hidden by a black knob or something located in the center of the modulator.

My problem has been that I did not know what the modulator looked like. I thought the thing on the other side of trans was modulator.

Thanks to Mercedes320.625 for the clue from another post who posted picture from Fast Lane... and who I hereby declare "Saint of the Day"... not to diminish of course the halos the other guys who tried to get through my thick skull.