Vacuum Leak

Find a vacuum leak with this easy technique

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

Locating the 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.

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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.

  • Water