Useless black box - vacuum? 1984SD - PeachParts Mercedes-Benz Forum

05-08-2005, 03:25 AM

DieselDaze DieselDaze is offline

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Useless black box - vacuum? 1984SD

I have disconnected and bypassed the black box vacuum 'flap valves' and all EGR tubes, and plugged up any open hoses. Car shifts fine.
Will this elimination of the 'flap valves (black box) leave TOO MUCH vacuum, unreleaved by these valves, and will this harm the transmission?
1984 300SD

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