Re: Viggen boost issues - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Viggen boost issues
Posted by lms (more from lms) on Tue, 6 May 2008 06:27:38
In Reply to: Viggen boost issues, RC, Mon, 5 May 2008 16:20:31
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I had a ting, ting you discribe on an old turbo mazda. When the car reached around 12,000 rpm and boost was over 20, it made this sound. It was indeed the blade expanding/floating and hitting the housing, but it did this no matter what th etemp was. But is this your problem-not sure. I would check to make sure nothing else is hanging in the car and is hitting something thus making the noise. Check, and recheck every vacuum hose to see if any have come off, or cracked-very hard to spot unless you take them off or pressurize the system. How is shifting, I ask because maybe a mount is failing and the engine is moving under hard acceleration thus causing the noise????
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