3rd Gen 4Runner Vacuum Leak locations

[cvan1971man]

Is there somewhere that I can find all of the different Vacuum Hose locations to figure out if I have a vacuum leak?

I'd like to be able to go through them one by one, but with all of the hoses on the 4runner, I want to make sure I don't miss one.

Thanks in advance.

 

[Spiker Engineering]

I used these for my 1997 4Runner when replacing all the vacuum/evap hoses. You can search their site for your model, if different:

Just a moment...

Just a moment...

Just a moment...

Just a moment...

Just a moment...

 

[gamefreakgc]

This technique has never served me wrong:

 

[Bad Luck]

My preferred method as well! Works great as long as you can spray where you think the leak is.

 

[gamefreakgc]

I kept chasing a po171 on this 4runner I just bought, tried brake cleaner around hoses, replaced hoses, etc. I finally had to find a smoke machine, located the leak at the bottom of the throttle body, some previous upstanding mechanic put the throttle body gasket in upside down. problem fixed.

Was I your mechanic? I did that wrong once on my 4Runner and drove me nuts figuring it out. Then I heard a noise from the throttle body and sure enough, upside down. It's surprising that Toyota didn't find a way to make the gasket fit only one way, most time they do.