Vacuum Leak?

[ice445]

Is this sound of air normal? I don't remember it being like this. Only thing I did was remove the intake tube, but I triple checked everything was seated and such so it's kinda strange. Vacuum gauge on the dash at hot idle showed 18.6 in/hg

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[GT Pony]

I don't hear any "air" sounds ... too much mechanical noise going on.

 

[Red65]

Do you have any stumble right as the car starts moving, or any hesitation when revving?

 

[ice445]

Do you have any stumble right as the car starts moving, or any hesitation when revving?

Nope, car runs fine. I'm gonna log fuel trims tomorrow if I can find my scan tool. It may be normal

 

[spaz mk will]

Any resolution or findings on this? I noticed the same noise last night and swear I haven’t heard it before. Hot idle in hot/humid conditions. I have the FRPP tune, so I have replaced the TB and intake and wondered if I had developed some leak from that remove/replace. Car has seemed completely normal, minus some longish start times and a just-barely-started yesterday; I replaced the battery last night preemptively and noticed this noise.

 

[ice445]

Any resolution or findings on this? I noticed the same noise last night and swear I haven’t heard it before. Hot idle in hot/humid conditions. I have the FRPP tune, so I have replaced the TB and intake and wondered if I had developed some leak from that remove/replace. Car has seemed completely normal, minus some longish start times and a just-barely-started yesterday; I replaced the battery last night preemptively and noticed this noise.

I forgot to log the fuel trims, but I will later to see if the mixtures look OK. If they do, I wager its just from how the air is flowing through the intake at idle with the IMRC mostly closed. I found some other threads asking about the same noise so it may be more noticeable with the engine cover off.

 

[Emilbadal]

I have a v6 and I have exactly the same kinda hissing (resembling to vacuum leak) from the intake area as well which I don’t remember before too. But the engine feels normal, no hesitation or weirdness at all. Seems like it’s just normal characteristic of the intake manifold design.

 

[ice445]

I have a v6 and I have exactly the same kinda hissing (resembling to vacuum leak) from the intake area as well which I don’t remember before too. But the engine feels normal, no hesitation or weirdness at all. Seems like it’s just normal characteristic of the intake manifold design.

Yeah, as far as I can tell it's just a venturi kind of sound from how the runner plates are oriented at idle

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