Smoke Test For Car

Your car needs to be checked from time to time, and you must add performing a smoke test to your priority list. In this article, we are going to talk about how to do this examination on a car, and by learning how to perform it, you won’t have to deal with car issues. 

What Is The Smoke Test For Car?

Is a test that it’s done to check the vacuum systems to look for leaks. After it is done, the expert who performed it will let you know if there are leaks in any of the pipes of your car. 

The car’s vacuum system can manage the air flow in and out of the engine itself. However, when something is leaking, the engine won’t work properly and a bigger problem could appear. 

To avoid issues, hire a professional. They will find any leak in the car’s hollow areas, like the evaporative emission system or the exhaust system. Through the smoke test for cars, these workers can find drips in your car.

If there are indeed leaks, it’s going to damage the car’s engine, and the fuel to air ratio will get out of hand by receiving a considerable amount of airflow. For example, if your vehicle’s engine takes a few seconds to get started, it could be a sign of air leaks. 

What’S The Cost Of A Smoke Test For Car?

The cost of a smoke test for car will depend on how bad the leaks are. For instance, if your car presents a serious case of leakage, the cost will range from $200 to $800. 

On the other hand, if the leaks are easy to cover, you won’t have to pay more than $90. It’s important that you take your car to a car workshop soon. If you wait too much, things could get worse, and the amount of money you will have to pay is going to increase. 

How to Do a Smoke Test on a Car?

Follow the steps below to perform it: 

1. Seal the plug

First, you need to seal potential openings in the intake manifold. You can begin with the inlet down to the throttle body from the cleaner. 

2. Connect the nozzle 

Then, you must plug the nozzle of the smoke into the manifold. A good place to do so is the vacuum line to the brake booster. 

3. Seal the cleaner 

To seal the air filter you can wrap it in plastic food wrap. After doing the smoke test for the car, don’t forget to unwrap the inlet. 

4. Hit the button 

Hit the button of the smoke testing machine. Let the smoke soak the intake tract. If you see smoke coming out of the oil port, it means there is a problem in the vent system. 

5. Pay attention to air leaks 

Air can leak from the exhaust system and into the manifold gasket. Because of this, the oxygen sensors won’t be able to work correctly. To check if everything is okay, fill the exhaust with smoke. 

Final Thoughts – Smoke Test For Car

A smoke leak test provides information about any leaks that may be present inside a vehicle.

A smoke machine is used to test automotive vacuum systems. Smoke is poured into the pipes, and the holes it comes out of reveal where the leaks have occurred.

The cost of a smoke leak test on a vehicle is about $89.99. Smoke devices can be purchased from $150 to $800.

Liam Dare

As CEO of, my passion for the automotive world motivates me to build online businesses that provide information and entertainment to users. I am proud to contribute in a positive way to the automotive community.