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Audi TT roadster boost broblem

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Old 03-04-2023, 11:05 AM
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Default Audi TT roadster boost broblem

Hi!
I have a great Audi tt 1.8T from 2006. The engine type code bvr.

I have a pressure control problem, the following is visible during dyno pad measurement. What do you think could be the problem, wastegate or n75 valve? Can N75 cause such an error? When driving, it stops above 4000rpm and there is a wavy fluctuation.

Thanks
Old 03-05-2023, 05:30 AM
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Various boost and vacuum leaks are now common in Mk 1s due to age of the tubing & connectors. It could literally be anywhere. See the "expected performance" post below for an example
Old 03-11-2023, 11:07 AM
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Originally Posted by Vegas-roadster
Various boost and vacuum leaks are now common in Mk 1s due to age of the tubing & connectors. It could literally be anywhere. See the "expected performance" post below for an example
Thanks! One day I replaced the n75 valve. Solved the problem, it pulls really well, it's probably leaking.
Old 04-01-2023, 10:40 PM
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After testing it, I am perfectly satisfied.
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