GX 470 engine makes weird noise like a vacuum (1 Viewer)

[moondoggy]

Hello everyone and thanks for dropping in.
My GX 470 2007 with 205k miles full dealer service minus just a little, I noticed the engine is making a noice, sounds like a vacuum, I thought it was the air bags because I just put in some new Arnott air bags, it seems to be something else, is there something else I have to look at? What might the sound be.
Thanks again

 

[RivMan]

Secondary Air Injection system. Don't ignore it, that system has been known to fail and cause bigger issues.

-Rob

 

[moondoggy]

What is the repair? Can it be driven?

 

[Hardazclay]

The secondary air injection system (SAIS) only operates for about the first minute or two after a cold start up. If you here your vaccume sound beyond that time and you don't have any engine codes then it's likely not your SAIS.

If your SAIS is acting up there are a number of different codes it would throw. Some of them are harmless and some will cause your GX to go into limp mode. I know there are other threads that dive deep on the SAIS issue if you want to get educated.

 

[moondoggy]

Thanks I will try to research the SAIS, so far I am not driving my GX, I do not want to do any harm to it.
Thanks again

 

[moondoggy]

Here is a video on it