What do you know about finding vacuum leaks?

What is the best to locate a vacuum leak?

How does a professional shop find a vacuum leak?

 

The most commonly used way of finding a leak is spraying carb cleaner on the vacuum hoses and listening to the engine change RPM when you hit a leak. I don't do that however, I simply replace all the hoses periodically. There's only what? 6 vac lines on the car? About 10' of silicone hose fixes it. If it's not a hose than carb cleaner works I guess. My mech simply finds them by ear.

 

dish soap in a spray bottle the leaks will bubble

 

i found a crack in my vacuum line that on the fenderwall near the battery its the one that comes off the lil 3 ended thingy pointing towards the firewall but it goes under the battery and is shrinkwrapped so i dont know where the other end of this line goes too to swapp it out my saab is a 1995 9ooo aero anyone know?

 

Carb cleaner is the quickest, but if I can't find it with that and I'm sure there is one, then I break out the smoke machine. Its mostly used for EVAP emissions leaks, but works great for vacuum leaks too.

 

if i am correct that line that goes through your false bulkhead runs to the boost gauge and the over boost protection switch

 

thank you boostpowered is there any chance you can tell me where that is cause what i guessed it was was the hose that went to or came from the big plastic thing that points at the radiator very close to the fan and thats what i connected it too but i dont want to break something and yes the car scoots a bit more it doesnt woosh like it did before
can you where this unit is or what to look for so i can hook it up correctly plz?

 

post some pics it will help diagnose the problem better . are you talking about the apc with three silicon lines sitting on the drivers side above the radiator fan that has a electrical connection that is essentially your boost controller

 

after my hangover wore off i reread your post and i understood it alot better got inside the false bulkhead and re ran the hoses to their proper spots everything is working properly now^^ty for the help