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'85 Mercedes 300 D Turbo Diesel
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284 Posts
Discussion Starter #1
Why do you suppose my mechanic disconnected the line from the vacuum booster to the alda valve on my car, and what benefits would I get if I hooked it back up???
 

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2001 Volvo V40
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2,954 Posts
That is not the vacuum booster, but a vacuum transducer. It reduces the vacuum for the transmission depending on turbo boost.

Is the line disconnected and open? or blocked off? Otherwise the ALDA would not get the turbo boost needed to increase the fuel.

Reconnecting the line can have several effects, depending on how the vacuum lines are connected right now and whether the vacuum transducer is still working. You need a vacuum gauge and an hand pump (one which can build vacuum and pressure) to test the transducer and the rest of the vacuum system.

MB used the transducer to smooth out the vacuum signal to the transmission, so that shifts would be less clunky. If it works, it works well.

Here is a vacuum scheme of the 1985 model

 
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