How To Check For Vacuum Leaks On Car Engine

Looking for directions on how to check for vacuum leaks on a car engine? There are many problems that vacuum leaks can cause with your car. Vacuum leaks can cause your car to have a fast idle speed and to hesitate, or even misfire, when accelerating. This guide will go over two ways to check for vacuum leaks on a car engine.

  1. Try a visual inspection. Before you move on to the second way of checking for vacuum leaks on a car engine, you should first perform a visual inspection. You will want to inspect all of the vacuum hoses and connections in your car engine. While your chances of catching a vacuum leak through visual inspection are low, it is worth a shot. When you are visually inspecting the vacuum hoses and connections in your car engine, you should be looking for any hoses that are disconnected, loose or cracked.
  2. Use starting fluid. If you are unable to locate a vacuum leak in your car engine by visual inspection, you will want to head on over to your local auto parts store and purchase a bottle of starting fluid. If you cannot locate starting fluid, aerosol carburetor cleaner will work as well. Turn your car engine on and let it idle. While the car engine is idling, carefully spray the starting fluid or aerosol carburetor cleaner around any vacuum hoses and connections. If you have a vacuum leak in your car engine, the speed of your idling engine will suddenly change.

You must exercise extreme caution when using starting fluid or aerosol carburetor cleaner around an idling engine. Both solvents are extremely flammable. Do not smoke while you are handling these solvents.