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Thread: 1.9 tdi 90 boost pressure sensor

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  1. Re: 1.9 tdi 90 boost pressure sensor 
    #11
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    Right I see, mine is ahu, how do I go about upping the boost with this valve? No point at min but when I get more fuel in I will need more air to
     
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  2. Re: 1.9 tdi 90 boost pressure sensor 
    #12
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    OK, the AHU does not use a vacuum as I said, it uses a pressure feed through the N75 to open the wastegate as boost rises. To be correct, in order to increase the boost you should have the ECU re-mapped to change the operation of the N75, or you can do what most people do and make a leak in the N75 to actuator pipe, some very sophisticated types even put on an adjustable leak!
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
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  3. Re: 1.9 tdi 90 boost pressure sensor 
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    I've been talking to some one tonight and he said exact same thing about making it leak so that's something I'm going to try. Just looking in to.bigger injectors and a decent tuning box
     
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