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Old 08-15-2014, 06:39 AM
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Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,925
Elimination of Vacuum Reservoir W124

On my 91 300D, I concluded that my vacuum problem was a bad VCV....so I replaced it. Things were noticeably improved, but I still had the occasional bumpy downshift. So, just for grins, I took the vacuum reservoir offline. And, wadda you know, shifting is perfect.

Especially on a 23 year old car, I'm all for simplifying the vacuum system to the extent possible to eliminate variables. AFAIK W124 vacuum reservoir - purpose?, the only purpose of the reservoir is to create a buffer of vacuum for faster flap openings and closings in the climate control....which I can certainly live without.

Anyone else take their reservoir offline? Any noticeable effects?

I know eventually I can eliminate the BFS....but I think I'll leave well enough alone for now.
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06 E320 CDI "Rutherford", Black on Tan, 178k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

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