1985-1998 [Subscribe to Daily Digest] |
you might be able to hear an audible 'tooting' sound around 4000rpm. Sounds almost like a steam whistle.
The bypass valve on my 9-3 ruptured under boost (1.1 bar) and as I underdstand this is a common symptom.
I too replaced it with a Bailey dump valve. It is very reliable, and sounds great.
Good luck.
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