Boost Leak Rabbit Hole
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Boost Leak Rabbit Hole
So I finally installed an ISSPRO boost gauge and pillar. It works great and looks great. I’ve been seeing on my Edge monitor that I can only get about 5-7 psi max for boost. I’ve replaced my up-pipes and collector, boost leak tested my whole system (banks intercooler as well, and checked the intake plenums. I still can’t find the leak. There’s a brand new turbo on it and there’s still the same issue. Any insight would be great. I’ve been chasing this thing down for months and can’t find it.
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Using a boost leak detector from Dieselsite. I’m pressurizing it with shop air and then spraying with soapy water. It bleeds air too fast to even really find anything. Everything just rushes out of the CCV. It won’t hold any pressure
Lead Driver
Joined: May 2009
Posts: 6,807
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From: Tobyhanma, PA
I would suggest putting the tester on at the turbo. The intake tubing before that isn't meant to he pressurized really.
You should be able to regulate it down to supply a steady 10 or 15 PSI. Should be easy to properly check then. The soapy water is good.
You should be able to regulate it down to supply a steady 10 or 15 PSI. Should be easy to properly check then. The soapy water is good.
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Ive got it directly on the turbo
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Mountain Pass
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Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
It’ll only pressurize to about 10psi max and drop off super quick
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Brand new turbo. Symptoms were the same with the old one.
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Forgot to add that there is no blowby when doing the oil cap test. Only some smoke, which is to be expected. But there is no pressure moving the oil cap at all when it’s laying on the opening
Lead Driver
Joined: May 2009
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From: Tobyhanma, PA
Thats a strange one. Might try sectioning things off to narrow it down. Maybe do the turbo through the intercooler and see if it holds, then do the same with tester at the Plenum Y. Thatll narrow it down quite a bit.
Does it hold psi steadily and only leak over that or once it hits 10 psi everything goes?
Does it hold psi steadily and only leak over that or once it hits 10 psi everything goes?
Thread Starter
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Mountain Pass
Joined: Dec 2019
Posts: 220
Likes: 13
From: VA
Thats a strange one. Might try sectioning things off to narrow it down. Maybe do the turbo through the intercooler and see if it holds, then do the same with tester at the Plenum Y. Thatll narrow it down quite a bit.
Does it hold psi steadily and only leak over that or once it hits 10 psi everything goes?
Does it hold psi steadily and only leak over that or once it hits 10 psi everything goes?
i kill the air supply