Measured vacuum at pump would not pull 5 INCHES at idle. Revving the car a
bunch it would almost get to 15 inches (0.5 Bar). R&R-ed vacuum pump now has
15 - 16 inches at idle just a bit after being started.
Booboo-ed on vacuum line from brake booster to vacuum pump, snapped off one
of the black vacuum taps. ( it is the one with a single line, not the one
with the 4-way connector. ). First I tried teeing it into the one with the 4
way connector - oooops! That did not work. I don't know what this line does,
the car is currently running with it disconnected. It seems to run, shift
and shut off .I have ordered a new vacuum - line from Rusty.
I don't know what this line does, it disappears into a plethora of vacuum
lines on the left fender well, connecting to many Y connectors, a 3 way
change over valve and the mysterious round thing with 3 vacuum connections
(now believed to be "pressure converter" (PDF 14-100, Diagram C. model year
1984 California).. I tried to leak test this line with a hand vacuum pump.
It does not hold vacuum. I tried to isolate some of its circuits but it is
not straight forward. Is this part of the EGR circuit? It is starting to
look this way, this part of my car seems to match the above 1984 California
diagram. Ideas suggestions?
Is there a master vacuum diagram (like the ETM) it is becoming most
difficult to get my head around what goes where ..An integrated diagram with
EGR, Tranny, engine shut off and boost would be helpful??
George Larribeau
Dallas Texas
----- Original Message -----
From: "Jim Cathey" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <[EMAIL PROTECTED]>
Sent: Thursday, March 23, 2006 3:51 PM
Subject: Re: [MBZ] 300SD 1985 Vacuum problems
I first start driving. 'But of course' the door locks work but they
are helped out with a electric pump on a 126 right?
The doors are _entirely_ run by an electric pump. The system is
completely disconnected from the engine vacuum pump. You need to
find out which system is leaking, if any, or whether or not your
engine vacuum pump is OK. There's a spec. for how long it should
take the pump to pump down an exhausted brake booster, but offhand
I don't know what it is.
-- Jim
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