Boost issues
Thread Starter
AudiWorld Super User
Joined: Feb 2004
Posts: 2,975
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Boost issues
My car is not meeting the desired boost levels.
I have to "jump start" the boost to reach 21 psi. for example:
On this graph I went WOT, boost only went to 19psi i then let go of the pedal for .5 sec and press it again(WOT) to see the boost just go over to 16.
I do it a couple more times(let go and get on the pedal) till the boost reaches desired level.
Since i have a fixed duty cycle, it indicates a mechanical failure, i have tried a new working n75 and had the same issue.
What other ideas you guys have for me to try.
I pressured tested up to 13psi or so should i try higher?
Thanks
<center>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/MAF.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/dutycylce.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/Boost.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
</center>
I have to "jump start" the boost to reach 21 psi. for example:
On this graph I went WOT, boost only went to 19psi i then let go of the pedal for .5 sec and press it again(WOT) to see the boost just go over to 16.
I do it a couple more times(let go and get on the pedal) till the boost reaches desired level.
Since i have a fixed duty cycle, it indicates a mechanical failure, i have tried a new working n75 and had the same issue.
What other ideas you guys have for me to try.
I pressured tested up to 13psi or so should i try higher?
Thanks
<center>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/MAF.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/dutycylce.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
<img src="http://i101.photobucket.com/albums/m57/hdias4/logs/bad%20boost/Boost.jpg" alt="Photobucket - Video and Image Hosting"><br><br>
</center>
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