Quote:
Originally Posted by airfoill
Hello to forum. The car is a 92 300D 2.5 Turbo. On these cars the shifting of the transmission is controlled by two vacuum units. One of these valves is up at the injection pump and according to the manual it is called the vacuum control valve. The other unit is attached to the transmission and it is called the modulator.
I've read somewhere that the vacuum control valve at the injection pump controls the timing of the shift and the modulator controls the quality of the shift. Does this sound correct?
Thanks!
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In scanning this thread, I don't see where you list any issue?
What is the issue?
The vacuum modulator is a common failure item.
Transmission shifting is effected by almost any vehicle vacuum leak,
excluding the central lock system.
.
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