The master vacuum element (drivers door) hisses when it is activated (plunger in the out position). I then also lose the vacuum reading. I have replaced this part and the same thing is still happening.

Is this normal?

Also, the engine will only shut off if the plunger is 'in'. I have found other leaks using a mightyvac. But this master vacuum element concerns me.


thanks all!

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1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs

I beleive that behavior is normal for the master vac element.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold