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Can anyone tell me what controls the wastegate 1.6hdi B9 . My problem is the wastegate solenoid buzzers intermittently and then the turbo is bypassed. It will be fine then for no apparent reason the vacuum solenoid starts to buzz and the voltage to the solenoid drops from 12 volt, and shifts about 6volt. comes right again and turbo kicks back in.. There is also the step motor? which apparently controls the amount of gate open.. but why the vacuum solenoid and what controls it? perhaps a relay?
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Welcome.
There may be differences between the 8v & 16v engines and also the power rating of the engine as the higher powered engines have a VNT turbo.
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Do you have any fault codes? The solenoid controls the wastegate and opens it when overboost is reached. Sound as if it might be faulty. Don’t know about the stepper motor. Just has wastegate with vacuums control for over boost on mine.
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16-01-2023, 10:32 AM
(This post was last modified: 16-01-2023, 10:33 AM by brajomobil.)
I had clogged vacuum tube to wastegate before solenoid.
It was on T-shape splitter. Solenoid was working ok.
There is no relay. It is controlled directly from ECU
Best regards,
brajomobil
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