Originally Posted by MBZ123

x2



nckmsn - modulator is last period.

There's a sequence to the testing of the vacuum system repeated ad infinitum in the multitude of vacuum related threads turned up via search. This article is priceless insofar as chasing down vacuum issues: everything mapped out. Here is another: It's CRITICAL... how you set your transmission's vacuum system on your diesel MBZ... . Now that you've invested in a vacuum pump, you are on the path to enlightenment. It will prove to be one of the wisest "investments" as an diesel benz owner. Oh, and highly doubt the pinching of the vacuum line will have an effect unless you are seriously clamping down with your fingers or some other implement. Simply folding over of the clear tubing is irrelevant. If you're concerned about this get some rubber/fuel hose from the local parts store if you don't already have some. I've sourced 5/32" hose at local parts house which is one or two thousandths smaller than the 4mm MB spec., if I'm not mistaken. Six feet will run you less than a ten spot. My hh vacuum pump is on the perma-ride-along for a couple months now as I shake down various parts. It has commandeered the vent line into the cabin at the end of the previously mentioned hose. I always know the vacuum just downstream of VCV, clip off a length of hose whenever needed...you get the picture.

Luke, may the search be with you.


FNHB