Locating the leak
Start the engine and spray
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.Photo: Courtesy of We do everything by our own hands
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.
Required Tools for this Project
Water spray bottle
Required Materials for this Project
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here’s a list.