Vacuum leak help, low idle

Joined
Dec 26, 2009
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My buddy's 1997 has a vacuum leak from somewhere. His mechanic tried using smoke, but cannot find it. It will barely idle. We had to use the hand throttle to drive it back this weekend. Any good techniques or advice where to check. Sounds like it's from the lower intake area where the hoses are.
 

94SRUNNER

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Joined
Oct 9, 2006
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4,059
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Dayton, OH
Systematically replace each vacuum line one-by-one to eliminate any faulty lines.

Vacuum hose is cheap and if they have never been replaced it won't hurt as they are probably dry and brittle.
 
Joined
Feb 1, 2016
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9
Location
Hendersonville, NC
I have the same "mystery" vacuum leak...replaced all visible and easy to get to hoses, it drove so good I filled it up with fuel and bought some wax to shine it up. Then same symptoms returned ...? Does anyone have a clear diagram of All vacuum hoses on the 1997? Also a confirmation of exact metric size would be helpful as locally here everyone just deals in English size hose...which I made work but the lack of precise size might be my current problem.

Thanks for any help available.
 

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