Engine running louder than usual? Get an expert diagnosis at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(78)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(78)


Engine is running louder than normal Inspection Service

An engine that is suddenly running louder than normal is usually crying for help. In the majority of cases an underlying problem is causing the engine to rumble. Problems can range from something simple like dirty spark plugs to the more serious failing muffler or catalytic converter.

While some of the issues that can cause a louder than normal engine are easy fixes, many problems are much more extensive and can quickly damage other systems, resulting in an expensive repair.

How this system works:

While a number of different systems can cause a vehicle to run louder, most of the time it is rooted in the exhaust system.

The exhaust system is responsible for collecting exhaust gases from the cylinder head. This is accomplished via the exhaust manifold, which basically functions as a big funnel diverting exhaust gases away from the engine cylinders. The exhaust gases are released through a part called the front pipe and from there they travel to the catalytic converter. The catalytic converter removes the harmful elements of the gases such as hydrogen monoxide and carbon monoxide. Finally, the exhaust gases exit the catalytic converter into the muffler. The mufflers main function is to reduce the noise levels of the engine. After the muffler, the exhaust fumes exit the vehicle through the tail pipe.

Common reasons for this to happen:

  • Failing Muffler: Mufflers are constantly exposed to heat and pressure not to mention road salts, grime and the weather. Over time a muffler will rust and develop holes and cracks. Eventually it will start to fail completely. A car that is running louder than normal is often due to a failing muffler. Other symptoms include a significant drop in gas mileage and an increase in exhaust fumes.

A failing muffler should be repaired or replaced immediately as an exhaust system that is not working properly can lead to additional damage to the engine or catalytic converter.

  • Failing Catalytic Converter: The catalytic converter is a key component of the exhaust system and if it is failing the engine will be louder than normal, will run rough and the smell of rotten eggs will be coming from the exhaust. In most cases, a failing catalytic converter will also trigger the Check Engine light. As the converter fails it will no longer be able to burn off the unburned hydrocarbons in the exhaust, or break down the sulfur created by the engine. This is what causes the strong rotten egg smell. Eventually the car will not run at all as the catalytic converter becomes totally blocked.

  • Broken Tail Pipe: The tail pipe comes out of the muffler and exhausts the gases and fumes into the air. A rusted tailpipe will often develop holes or will completely fall off at some point. This will increase the noise levels of the car.

  • Leak in Exhaust Manifold: The exhaust manifold collects exhaust gases from the engine. If there is a leak in the exhaust manifold it can cause the engine to run louder, sputter and run unevenly. In most cases it will also trigger the Check Engine light. A cracked or leaking exhaust manifold can create bigger problems due to the hot gases that are escaping. They will often melt nearby plastic components. It is also possible for leaking exhaust fumes to find their way into the cabin of the car.

  • Worn Seals or Gaskets: The exhaust system has quite a few seals and gaskets and if they are failing it can cause the engine to run louder, and sputter at times. Over time, gaskets and seals will wear down and eventually have to be replaced. If this problem is not repaired it can end up damaging the exhaust manifold which will be a much more expensive repair.

  • Malfunctioning Oxygen Sensors: The job of the oxygen sensors is to measure how rich or lean the exhaust gases are when they exit the combustion chamber. The computer in the vehicle uses this data to adjust the amount of fuel that is entering the engine. A failing or dirty sensor can send incorrect data, resulting in too much or too little fuel going to the engine. This can result in a rough running engine that is louder than normal.

  • Bad or Dirty Spark Plugs: Bad spark plugs can cause the vehicle to misfire which will make it run louder. Spark plugs provide the spark for igniting the fuel in the combustion chamber, if they are not operating correctly, the fuel is not completely ignited and the vehicle will misfire or sputter. The plugs will need to be replaced or cleaned.

  • Dirty Mass Airflow Sensor: A mass airflow sensor measures the amount of air entering the fuel injection system. This information is sent to the vehicle computer so it can send the correct amount of fuel to the combustion chamber. A dirty airflow sensor can result in the wrong amount of fuel going to the injectors, which can result in a rough running engine that will sound louder than normal.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the engine is running louder than normal issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

A mechanic will inspect your exhaust manifold, oxygen sensors, catalytic converter, and other important components of your car to determine the source of the loud running engine. The mechanic may need to crank up your car to provide you with an accurate diagnosis.

How important is this service?

A failing exhaust system will not only make a vehicle louder it can make it dangerous to drive. Exhaust fumes can make their way into the vehicle cabin, which can present health problems. In addition, minor exhaust issues such as a failing gasket can quickly lead to a more expensive repair like a cracked exhaust manifold or clogged catalytic converter.


Recent Engine is running louder than normal Inspection reviews

Excellent Rating

(78)

Rating Summary
71
2
0
0
5
71
2
0
0
5

Brian

23 years of experience
641 reviews
Brian
23 years of experience
Jeep Patriot L4-2.0L - Engine is running louder than normal - Jacksonville, Florida
He was very professional. Let me know my problem wasn't severe. With that honesty I booked getting my belts and pulleys changed right away!
Toyota Camry - Engine is running louder than normal - Jacksonville, Florida
Thank you Brian for your candor. Brian was very professional, personable, very knowledgeable, and kind. He asked a lot of questions regarding the vehicle, from the owners perspective, he did not act like a "know it all mechanic" He actually listens to his customers. Even though he wasn't able to fix the problem with my vehicle, he gave me excellent recommendations on how to get the problem solved. I wish that he was at the dealership to fix my car when I take it in. My family will continue to use Brian in the future if we need any repairs. Stay Safe and Healthy!

Clarissa

27 years of experience
230 reviews
Clarissa
27 years of experience
Kia Optima L4-2.4L - Engine is running louder than normal - Chester, Pennsylvania
I trust Clarissa. She is knowledgeable, went above a beyond on both of my vehicles. Found problems and fixed them when other mechanics could not figure out what the issue was. I know without a doubt if I have a problem with my car Clarissa has the solution.
Oldsmobile Cutlass Ciera - Engine is running louder than normal - Wayne, Pennsylvania
Clarissa was extremely knowledgeable about the car’s engine, and was able to tell me what needed to be repaired in a way that I easily understood. She seemed to be very honest and trustworthy, and left me with the feeling that there would be no “paraded” charges unlike some car repair places. She was respectful and empathetic to my desire to save money.

Jimmi

27 years of experience
228 reviews
Jimmi
27 years of experience
Chevrolet Venture V6-3.4L - Engine is running louder than normal - Orlando, Florida
Mr. Jimmi Philips is very professional possessing KNOWLEDGE, INTEGRITY, and 5 star SERVICE! He explains the diagnosis in detail and provides the best resolution to the problem. In Jimmi's hands your car is treated like his own. The experience and the man are perfect in every way.

Rey

6 years of experience
23 reviews
Rey
6 years of experience
Ford Ranger L4-2.5L - Engine is running louder than normal Inspection - Simpsonville, South Carolina
Very prominent, professional and courteous. New what he was doing and what to look for. He gave me the answer I needed to make my decision. Well worth the money.

Recent articles & questions

A Buyer’s Guide to the 2012 Honda Civic
America’s America’s best-selling compact car, the Honda Civic has been around for nine generations now, and the 2012 models boast some very exciting features and upgrades. Including coupe and sedan styles, the Civic continues to be one of the most...
P0200 OBD-II Trouble Code: Injector Circuit Malfunction
P0200 code definition P0200 is a generic OBD-II diagnostic trouble code in reference with the injector circuit Note: This code is similar...
How to Replace a Lost or Stolen Car Title in All States
A car title is a slip of paper, so it can be easy to lose. Fortunately, it is also easy to replace. Check out how to do so according to your state.

What does the Anti-theft light mean on the dash?

Your car comes standard with a handy Anti-theft system called SecuriLock®. When you lock the doors and activate the Anti-theft system, the light will show in the dash. It should flash slowly, which indicates that the system is operating normally....

Starter parts

Hello. You will need all of the bolts for the intake manifold, intake manifold gaskets, and starter bolts. The bolts must be replaced because they are made from aluminum, and are designed for one-time use. Gaskets should always be replaced...

Jerking reaction when accelerating

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

+1 (855) 347-2779 · hi@yourmechanic.com