Quote:
Originally Posted by wullaby
also how do you check for vacuum leaks in vacuum lines???
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Well, visual inspection is the first way.
The second way is to spray something near the leak that will get sucked into the leak and change the engine RPM or sound. Some people have used an UNLIT propane torch for this; however, I typically use carb cleaner or some WD-40 spray. WD-40 spray is less likely to mar or damage any plastic parts.
You spray the WD-40 where you suspect there may be a vacuum leak, and if there is one there, it will suck some WD-40 in and the engine RPM will change.
Do a Google on "automotive vacuum leak diagnosis" and you'll get a lot of links.