Vacuum leaks can cause a variety of engine problems, and pros charge money to find them. Here’s how to track them down yourself with a spray bottle.
By the DIY experts of The Family Handyman Magazine:October 2012
Scope out all the vacuum lines under the hood. Then start the engine and spray each connection with a light stream of water. If a connection sucks in the water, you've found your leak.
A vacuum leak can cause a rough idle, high rpm, poor gas mileage and even trigger a check-engine light. Pros find leaks by filling the engine with smoke and looking for wisps of it. But you can search for leaks on your own with an ordinary spray bottle using this technique.
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
Water spray bottle
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.
