Using the carb cleaner method to identify the source of my idle problems, I have discovered a vacuum leak somewhere around the back of the intake manifold. Since the fan blows the cleaner around, I can't identify exactly where it is leaking. It may be the mainfold gasket or somewhere below it. My hose schematic is fairly vague. Are there any hoses below the manifold or directly behind the throttle body? 1995 4Runner with 3.0 v6. Thanks in advance!