ok, since you S4 guys seem to get your hands dirty when it comes to tuning... diagnose this, please:
01-17-2005, 05:39 PM
#1
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ok, since you S4 guys seem to get your hands dirty when it comes to tuning... diagnose this, please:
After 6 months, nothing has changed. And I'm at a loss as to what to check or replace next, before I swap in another stock turbo.
I'd really like to find the issue before putting in a bigger turbo before the track season starts - hopefully in April at VIR.
My prior post back in August:<ul><li><a href="https://forums.audiworld.com/a4/msgs/2144100.phtml">https://forums.audiworld.com/a4/msgs/2144100.phtml</a</li></ul>
I'd really like to find the issue before putting in a bigger turbo before the track season starts - hopefully in April at VIR.
My prior post back in August:<ul><li><a href="https://forums.audiworld.com/a4/msgs/2144100.phtml">https://forums.audiworld.com/a4/msgs/2144100.phtml</a</li></ul>
01-17-2005, 05:45 PM
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and it looks as if "Quattro Pete" may have the same issue. here are his logs:
<ul><li><a href="https://forums.audiworld.com/a4/msgs/2234024.phtml">https://forums.audiworld.com/a4/msgs/2234024.phtml</a</li></ul>
01-17-2005, 05:59 PM
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ok, so let me see if i understand this right......
your requested and actual boost are fine, but it just doesn't read the same on your boost guage? From your previous post, the wastegate duty cycle isn't a mechanical thing, it has to do with your N75 valve.
01-17-2005, 06:21 PM
#7
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The valve spring or valve seat in the wastegate(s) could be worn...
I had same problem w/ 944T, It turned out to be the valve head warped over time & was allowing boost to escape when closed or "seated".
