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Bubbling sound during inlet air pressure test?

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Old 03-25-2006, 01:45 PM
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Default Bubbling sound during inlet air pressure test?
(Cross Post from A6)
I have a code for low boost pressure so I made the Y-pipe test fixture per the AWE Tuning recommendation expecting to find a cracked TBB or air leak somewhere. I have the main inlet and the 3/4 PCV inlet capped off. With about 10psi static pressure I hear no air leakage, but I do hear liquid gently bubbling steadily that stops when the presuure is disconnected. There are no liquid leaks anywhere.

If I block PCV valve (disconnected from the 3/4 outlet on the Y-pipe) I can blow oil out the dip stick tube.

The only symptom apparent when driving is harsher shifts. Ideas anyone??
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Old 03-25-2006, 02:24 PM
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loosen the gas cap when you test. its bad for the cats not to. bubbling is normal.
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Old 03-25-2006, 04:48 PM
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you mean oil cap?
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Old 03-26-2006, 08:15 AM
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Default no...gas cap...
if that's what you're using as the oil cap :P...lol Yeah he meant Oil Cap I have to believe.
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Old 03-26-2006, 07:36 PM
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Default try removing oil filler cap
<ul><li><a href="http://www.awe-tuning.com/media/pdf/27t_pressure_tester.pdf">AWE pressure tester (PDF)</a></li></ul>
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Old 03-27-2006, 08:41 AM
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yup. oil it was. sorry!
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