The kits instlalled very smoothly, thanks to Brian Carlton's detailed instructions.

However, I went on to remove what I thought were unnecessary vacuum lines, and I have two questions about what is actually necessary and unnecessary:

1. On my 1983 300D-T, I removed all the lines from the egr, all the way upstream to the black plastic box on top of the valve cover (I found no arv vacuum line). so far so good. However, in my zeal, I removed the plastic box "switchover valve" and contents as well. Now I'm realizing that I went too far--that one of the functions of the box is to allow a "bleeding" of vacuum depending on accelerator travel, thus reducing vacuum to the transmission when the accelerator pedal is pressed. So, I should put it back. Can someone please confirm this for me?

2. On my 1984 300D-T California (the system is different on it; see attached diagram), I did something similar: removed all lines from the egr and arv, including the "vacuum converter" (#84) on the passenger side wall of the engine compartment, just back of the headlights, and going all the way to the vacuum junctions at the driver's side of the engine compartment. Because there is no plastic "switchover valve" on top of the valve cover for this year/Cali model, I was assuming that on this car, I did not mess up--that the transmission-related-accelerator-vacuum-reducing function is somewhere else, and not integrated in the parts that I removed. (The trans. certainly feels okay). Is this correct? Or, did I mess up this one also--could it be that the "control unit" (#80), using the data from the "rpm sensor" (#82), actually uses the "vacuum converter" (#84) to do just that, i.e., reduce vacuum to the trans depending on accelerator pressure? Please don't tell me that I just answered my own question!

Any light you can throw on these questions will be much appreciated.

Attached Thumbnails

 

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J. S. Park

'82 240D Manual 240D (sold)
'83 300D-T 230k (sold)
'84 300D-T 118k (sold)