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So I got everything set up, and started pushing into the air at 10-15psi or so. Immediately heard a hissing, then realized I forgot to plug the IAC hose. Got that blocked off and then listened again. What I expected to hear was a hissing noise if there were any leaks.
I didn't hear a hissing noise, but it wasn't completely quiet either. The best way to descibe it was the noise that a tire makes when you're pumping air into it. A muted hissing I guess is the best way to put it. I held it for a while expecting that filling noise to stop, but it did not. It sounded like it was coming from the area around the intercooler or intercooler-to-throttlebody piping
So my question is, should I be listening for complete silence, or should there be some amount of noise as air goes through the system.
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