Vacuum leak?

[CMiles]

I have a 1995 4runner with a 3vze 3.0l v6 and I have been having some issues idling. It idles good most of the time but every one in awhile the rpms will dive to just under 500. I hear a air sucking noise coming from the passenger side of the motor but I can not tell it this is normal or maybe a vacuum leak. I havent been about to find a leak but the noise seems like it would be a leak.

I appreciate any help anyone can give me.

 

[Ahlem]

Try wiggling the hoses to see if you have one with a cracked end.
Be careful with the PCV one so it doesn't crack, don't ask me how I know.

 

[CMiles]

Try wiggling the hoses to see if you have one with a cracked end.
Be careful with the PCV one so it doesn't crack, don't ask me how I know.

I tried that but nothing seems to be loose or broke. I was thinking maybe in the pcv side of the tube...

 

[crash813]

Vacuum leaks lean the engine out and general has the idle running higher than normal. Doesn't mean the root cause still isn't a leak, probably an inconsistent one if it is the problem which means its a pita to find. Several youtube videos on DIY leak detectors you can try. Several threads on here as well.

Good luck in finding the issue but be prepared to chase down a lot of rabbit holes.