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problem holding boost

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Old Jan 10, 2009 | 09:09 AM
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problem holding boost

hi guys sorry to bother you but i have a problem holding my boost and cant figure out why its not holding it... it will spike 25 and normally holds it but then all of a sudden it started dropping to 15 lbs... anyone can make a suggestion on why this would happen thank you
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Old Jan 10, 2009 | 09:35 AM
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boost leak test?
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Old Jan 10, 2009 | 09:59 AM
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not yet gonna have to i guess... no lines are losse or anything so idk
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Old Jan 10, 2009 | 10:03 AM
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Bad boost controller, stuck wastegate, boost leak.
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Old Jan 10, 2009 | 11:50 AM
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boost controller is fine dont know about the wastegate, and how do i go about getting a boost leak check?? it was all fine before i went to the track yesterday and worked great at the track but after i left it started not holding the boost
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Old Jan 10, 2009 | 11:57 AM
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search for boost leak test or tester
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Old Jan 10, 2009 | 12:00 PM
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boost leak test and i see you have an aftermarket intake but if you have the snorkel from the stock intake still on, check on those tabs
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Old Jan 10, 2009 | 12:06 PM
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i have an aftermarket k&n cone on the stock rubber piping and all the hoses are attached and look fine
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Old Jan 10, 2009 | 01:12 PM
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From: digging for oil
Originally Posted by evokid511
i have an aftermarket k&n cone on the stock rubber piping and all the hoses are attached and look fine
tharts fine budy, but you wont see a boost leak, you will barely hear it sometimes even doing a boost leak test.

it can be too many thinkgs most common, BOV, loose intercoolers pipes clamps, wastegate, do a boost leak test that will 95% of the time tell you whats wrong.

in my case i wasnt holding boost on top, changed stock diverter to a forge RS and hold 26 psi all the way to 7k believe it of not,,,,, but of course is Jesrtr tunned, he has some tricks to hold on top
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Old Jan 10, 2009 | 01:22 PM
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i guess i have to because i checked all the I/C piping and its on nice and tight, anf i have a type RS BOV figured maybe it was that so switched back to stock same thing though...
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Old Jan 10, 2009 | 01:22 PM
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how do you go about getting a boost leak check???
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Old Jan 10, 2009 | 01:35 PM
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the easiest way is to get a pipe cap that matches the size of the inducer hole on your turbo (I think it is 2.5") you drill a hole in it (1/2" bit I believe) and then get a valve stem and put it through the hole you just drilled, make sure it fits tight. Then use either a coupling that you have on your intake or get something to allow you to seal it against the turbo. Then just pump the system up with air and listen!
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