Carbon monoxide

Hi and thanks for using 2CarPros.

A vacuum leak isn't going to cause the issue. If you are getting fumes from the engine, it is most likely caused by an exhaust leak. Was the exhaust system inspected? Does the tail pipe exit the side or rear of the vehicle?

Is the vehicle running properly or is the check engine light on?

Here is a link that describes the components and issues with an exhaust system. Take a look through it to see if there is anything that is helpful.

https://www.2carpros.com/articles/how-exhaust-systems-work

Let me know.

Joe

Welcome back,

When checking, look for rust and black carbon marks anywhere on the system. Black carbon commonly indicates a leak. The vehicle is new enough that I doubt there are body rust issues. However, inspect the floor under the vehicle for holes and make sure there is nothing damaged or preventing all weather molding on the doors. Also, if you notice the smell more when the heater or AC is on, suspect a leak under the hood.

One last thing. Not all exhaust leaks are loud. Often times, if there is a leak at one of the exhaust manifolds, it sounds like a ticking that may be noticeable when cold and go away when hot.

Let me know if you have any questions, and Happy Thanksgiving.

Take care,
Joe