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Discussion Starter #1
:confused: I have made myself a leak test device out of pvc pipe in order to leak check my turbo and intercooler plumbing. I have removed the mass air sensor and the Y pipe. I have plugged the two hoses that ran to the Y pipe from the intercoolers and am putting the pressure in at the large boot that the mass air sensor was plumbed into. My question is why am I getting a large amount of pressure blowing out of the plenum where the Y pipe was removed? There should be know relationship with the intake plenum and turbos with Y pipe removed? This is a large amount of air blowing out the plenum and I can not build up any pressure while testing. The only thing I can think of is a vacuum line tied into the turbos is venting back to the intake. I am going to investigate some more but any input meanwhile would be greatly apreciated.
 
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ok, the air goes into the pvc pipe, then thru the turbos, to the intercoolers and then up to the Y pipe. you disconnected it. you should NOT have disconnected your Y pipe. reconnect it and then you should be able to build up pressure in the system. it needs to be a CLOSED loop to build pressure :)
 

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Discussion Starter #3
ah!

I found a line that ran up to the plenum from the boot that the mass plugs into.Plugged it and now I am leak checking. I used two cold medicine bottles to plug the two lines comming from the intercoolers and that worked fine. I know that the Y pipe is a problem but I took it out of the picture for this test.
 
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