Bubbling sound during inlet air pressure test!
03-25-2006, 01:36 PM
#1
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Bubbling sound during inlet air pressure test!
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?
(Cross-posted to S4)
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?
(Cross-posted to S4)
03-25-2006, 07:05 PM
#2
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Bubbling is always present when pressure testing. I don't remember what it is, but it definitely is
normal. So your harsher shifts are probably the placebo effect. Stay under 10 PSI with the pressure test (looks like you did).
You're fine. : )
You're fine. : )
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