I think im boost leaking, if any one has a prebuilt set up to test the intercooler and pipes let me know. i hope its not a vacum line.

 

ugh i just showed someone how to do this... gimme a sec

 

To make you own tester; buy a cap from homedepot that fits on the charge pipe, hose clamp that on with a silicon coupler just after the turbo, drill a hole on the cap so you can fit a valve stem (tire one), and on the other end near the TB or so do the same and cap it off but you won't need the valve stem on this side, fill it with air like a tire but don't exceed say 10-15 PSI cause you might blow your intercooler, from there you should be able to pin point where the leak is.
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I'm posting this up because it is one of the most invaluable tools you will ever find for your turbo cars. Vaccume leaks are the source of countless other problems that seem like more expensive problems unless you know what you're looking for. Everyone should be doing this when they get their cars and replaceing those ancient 15 yo rubber hoses.*

How to build an Pipe Pressure Leak Tester
Parts Needed:

A 4 inch long piece of 2.5" O.D. (outside diameter) hose. (I used some radiator hose I got at NAPA)
1.5" I.D. (inside diameter) PVC end cap.
2 band clamps that will fit around the 2.5" pipe above.
A valve stem (I used the rubber type you press in)

Note that if you have a larger turbo, the sizes of the end cap and hose may need to be larger in order to fit the turbo inlet.

To assemble, just put everything together as shown.





To assemble, just put everything together as shown.





To get the valve stem in, I had to drill a hole in the PVC cap.


To use it, just remove the intake pipe from your turbocharger inlet, and attach this in its' place.

Now you need to hook something up to the valve stem to pressurize the intake so you can listen for leaks. I use a 7 gallon air tank I got from Walmart, I just fill it up with air at the local gas station. You can also use a simple bike pump.

If you have a manual boost controller hooked up, you might want to plug off its' intake hose, as they leak a lot of air, making it hard to pinpoint the real leak.

Pressurize the system, and listen all over for leaks. Make sure you or a friend listens under the bumper too, wherever there is IC piping.

A leak will be obvious, they make a loud hissing sound.

You might want to have a friend check out your boost gauge while you are pressurizing things, to make sure you don't put too much pressure on things. (20 psi should be safe, or whatever you run safely for boost)

 

LOL sorry man... haha i now how to make one i just am to lazy so i purchased one from boostpro.net it comes with a gauge and evrything not bad. 20 bucks. but if any one has one at there place and wouldnt mine me using it for 10 min, give a shout. im sure somthing is messed up.

my boost gauge normaly at idle reads -20 and boost to 14 but when i let of the boost it drops below -20 to -28 and stays there till im back at idle or back on the pedel. does that sound like a boost leak to you?