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Discussion Starter #1
last night i was driving the supra and noticed that at wide open throttle im getting this vrummmmm ttt ttt ttt ttt ttt when the second turbo comes on, (ONLY ON THE SECOND ONE) and boost is only like 1.4-1.5 now instead of if 1.7-8.

It sound as if its comming from the drivers side? Im gussing that i blew a hose, so you all got any sugestion on where to start looking?
 

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Discussion Starter #3
No no, it sounds more like air leaking out of something, but its not a constant sound.


SO like in that link if you can make the noise go on off on off on off about every 30 seconds. However the sound it different.
 

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You probably have a hole in the vacuum hose at the bottom of your EGR valve. I believe www.mkiv.com has some pictures and info. in there tech section.

Later, Steve
 
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