Simple Steps On How To Efficiently Find A Vacuum Leak…

One of them most common problems for vacuum is the hose. This is the most common source of engine performance problems. After a very long use of the unit, the hose would wear out, split, soften, or harden, and after a while, it would eventually deteriorate and breaks, and this can cause various problems in your vacuum unit.


One of the most noticeable effects is leakage in your vacuum. Whenever you feel that there is a problem in your vacuum unit and you do not know how to find the source, this is the right thing to read.

A vacuum leak can cause ignition problems, engine instability that significantly affects the unit’s efficiency, and it can even cause you serious accidents and injuries. This vacuum leakage can even prevent EGR valve to open that leads to overheating of the engine and the increase of harmful, emissions from the unit.

Common Symptoms of a Vacuum leak:

• Check engine light On

• Break performance problems

• Misfiring

• Stalling when starting the engine• Poor fuel economy

• Bad acceleration• Stumbling

• Low engine power

The symptoms mentioned above may be caused by various problems and not necessary a vacuum leak. Some of the causes can also be a bad EGR valve, ignition timing inefficiency, or bad compression. However, if you are very certain that a vacuum leakage causes it, here are the instructions in finding out.

Finding Vacuum Leak - Solution No. 1

Find your vehicle’s vacuum diagram.

Having one is necessary. You can locate it on your car’s manual. However, most of the manufacturers put it inside the engine compartment for easy finding. When you can’t find the diagram on the car’s manual, just raise the hood and on the front compartment, look for the decal.

If you can’t find it in the compartment, or you accidentally lost it, you can always buy at the your car’s dealer service department. Another options are purchase a vehicle repair manual which you can but on any inexpensive market.

When you look at the vacuum diagram, you can see a lot of controlled devices and how they interconnect as well as each part’s functions. The parts are image based on how they look in actual with their respective location.

When you now have the diagram, you can now follow the instructions given. However, if you don’t have any, you can still solve the problem. You always have a plan B – given below.

Finding Vacuum Leak - Solution No. 2

However, listening might be a problem for you because it is mostly impossible to hear. You can do two things for this:

1. Use a mechanic stethoscope:

Using a mechanic stethoscope would amplify the hissing sound from the hose.

2. Use a length of hose:

When you don’t have a mechanic stethoscope, you can try using the length of hose for amplification.

Follow the steps given below in checking each of the hose:

Step 1:

Start the engine and let it idle first. Set the transmission to PARK (automatic) o you can set it to NEUTRAL (manual). After this, apply the Emergency Brake.

Step 2:

Check if the hose is properly connected. You may want to avoid having it lose or hanging freely. It is easy to lose a hose every time you are having a maintenance or replacing a component. It is also advised to use a small mirror and a flashlight during operation since it 's hard for the naked eye to see the deepest places such as the behinds of the intake manifold, exhaust manifold, or the throttle body.

Step 3:

Unplug the hose and inspect if there is something wrong at both ends. If you can see that the inside of the hose is worn, torn, or widened, you may need to cut off the damaged part to answer the problem. After cutting it out, plug the hose back to its location.

Step 4:

Using your fingers, trace the whole length of the hose to check for rough parts, or the parts that are hardened, softened or splitting. You can also check for some shapeless or uneven spots, particularly in those hidden parts or on the underside of the hose.

Step 5:

Check if the hose touching a hot surface.

Step 6:

Check for looseness or cracks on other parts like the hose connectors, the unions, and the tees. When they are faulty, replace them immediately.

Step 7:

Leakage can also be caused by any contamination in your hose. This can be in the form of oil, coolant, or any other substance. Check them. Disconnect the hose and check the device connector. Clean if you find any foreign substance inside the hose and the device as well. After cleaning, check it is solves the problem.

Step 8:

If you locate any spots that is either hardened, softened, or damaged, immediately replace it.

So you see, it is always easy to find solutions to a problem. All you need to do is to find the vehicle’s diagram for further instructions or use the solution no. 2 that we provided to you. Get rid of the faulty parts immediately to have a real car experience once again.

Do you like the post? Comment us what you think about the article, and we will be happy to read and reply to them. If you like it, share it with your friends and colleagues.

About the Author Chris Lawrence

Leave a Comment: